Is this PDF signer really free?

Yes. 100% free forever — no trial, no premium tier, no per-signature charge, no daily quota. Sign as many PDFs as you want. Ad-supported so it stays free for everyone. Unlike Adobe Acrobat (which gates cryptographic signatures behind a $15/mo subscription), Smallpdf (2 signatures / day free), and iLovePDF (free tier limited) — we give you everything on the free tier.

Do I need an account?

No. No signup, no login, no email, no captcha, no credit card. Open the page, drop your PDF, sign, download.

Is my PDF uploaded to a server?

No. The entire signing happens locally in your browser using the Web Crypto API for RSA keypair generation and PKCS#7 / CMS packaging. Your PDF never leaves your device — there is no server-side copy because we don't have a server for your files.

Is my signature or private key sent anywhere?

No. Your signature image, drawing, or typed name stays in browser memory. If you upload a .p12 / .pfx certificate, it's parsed locally — never transmitted. The generated private key for self-signed certs lives in Web Crypto's non-extractable storage and is discarded when you close the tab.

What's the difference between an electronic signature and a digital signature?

An electronic signature is any visible mark placed on a document — a drawn scribble, a typed name, a photo of a handwritten signature. It looks like a signature but has no cryptographic proof. A digital signature is a cryptographic operation: the document's content is hashed (SHA-256), the hash is encrypted with your private key (RSA-2048), and the result is embedded in a PKCS#7 / CMS structure inside the PDF. Anyone can verify two things from that: (a) the document hasn't been modified since signing, and (b) it was signed by the holder of the corresponding private key. Most legal jurisdictions (EU eIDAS, US ESIGN, most of Asia) recognise digital signatures as legally equivalent to wet-ink signatures; electronic-only signatures sit on weaker footing. Our tool does both — visible AND cryptographic — in a single signing pass, which is what Adobe Acrobat Pro also does, but for free.

How do I sign a PDF for free?

Drop your PDF on the page above. The editor opens with the Certify modal pre-selected. Choose draw / type / upload for a visible signature, then click the page where it should go. Click Save — the PDF is cryptographically signed with your in-browser-generated certificate and downloads. Entirely free, entirely local, no signup. Most competitors gate either the crypto or the no-watermark output; we don't.

How do I add a signature to a PDF?

Same flow. Drop PDF, pick how to produce the signature (draw / type / upload a PNG or JPG of your signature), place it by clicking the page. Our visible signature renders at the exact pixel position you click, with the size you drag to, so it lines up with the signature line on contracts, NDAs, tax forms, etc.

Are PDF signatures legally binding?

In most jurisdictions, yes, with nuance. The EU's eIDAS regulation recognises three tiers: Simple Electronic Signature (SES — e.g. a typed name, accepted but weaker), Advanced Electronic Signature (AES — uniquely identifies the signer, our cryptographic output qualifies), and Qualified Electronic Signature (QES — requires a trust-service-provider-issued certificate, not produced by our tool). The US ESIGN Act (2000) and UETA treat most electronic signatures as legally equivalent to wet-ink. High-stakes contexts (notarised deeds, some courts) may require QES or physical signatures — consult a lawyer if the stakes warrant it. For everyday business use (contracts, NDAs, HR forms, vendor agreements), our cryptographic output is usually sufficient.

What is PKCS#7 / CMS?

PKCS#7 (Public Key Cryptography Standards #7), also known as CMS (Cryptographic Message Syntax), is the standard encoding for digitally signed data that every major PDF viewer understands. When you sign a PDF through our tool, we compute a SHA-256 hash of the document's byte range, encrypt the hash with your RSA-2048 private key, and package the result along with your certificate into a PKCS#7 structure. That blob is embedded inside the PDF's /Sig field. Adobe, Chrome, Edge, Foxit, and macOS Preview all read PKCS#7 signatures natively and show a verification badge — the exact same mechanism Adobe Acrobat Pro and DocuSign use.

Do the signed PDFs work in Adobe Acrobat?

Yes. Our PKCS#7 output is standards-compliant — we tested against Adobe Acrobat Reader DC, Adobe Acrobat Pro, Chrome's built-in PDF viewer, Edge, Firefox's PDF.js, macOS Preview, and Foxit Reader. All show a verification badge. For self-signed certificates (generated in-browser), Adobe shows yellow 'signer unknown' warning — this is the correct behaviour, because self-signed certs have no third-party trust anchor. To get a green badge, upload a .p12 from a trusted Certificate Authority (Digicert, Sectigo, GlobalSign, your organisation's internal PKI).

How do I sign a PDF with a .p12 / .pfx certificate?

In the Certify modal, click 'Use existing certificate'. Upload your .p12 or .pfx file, enter the password if it has one. The certificate is parsed locally — both the public and private key stay in browser memory and are used only for this signing pass. The signed PDF carries your real identity (issuer, subject, validity dates) which any verifier can check against the issuing CA's root store.

What if I just want a visible signature without the crypto?

Pick the 'Visible only' option in the Certify modal. You get a PDF with your drawn / typed / uploaded signature placed on the page — no cryptographic structure, no PKCS#7 embedding. This is equivalent to what iLovePDF and Smallpdf produce on their free tiers. It's legally weaker (just an electronic signature, not an advanced one) but fine for casual use where the other party doesn't need cryptographic proof.

Can multiple people sign the same PDF?

Yes, sequentially. Sign once and download. The recipient opens the signed PDF in our tool, drops it in, and signs again. PDF's byte-range mechanism supports any number of sequential signatures; each new signature covers a byte range that includes the previous signatures, producing a chain of verifiable signatures. (Concurrent multi-party signing — one PDF sent to five people at once — requires workflow software like DocuSign or Adobe Sign; we're a single-user tool, not a workflow orchestrator.)

Does it work offline?

Yes, once the page has loaded. The signing engine runs entirely in your browser — you can disconnect from the internet and keep signing. Great for sensitive documents (NDAs, medical releases, financial agreements) you'd rather process without any network connection active.

Can I sign a PDF on my phone?

Yes. Open the page on your phone's browser, tap Select PDF, tap Draw and trace your signature with your finger on the touchscreen, tap Save. Works on iPhone Safari, iPad, Android Chrome. Touch signing feels natural on iPad Pro with Apple Pencil — comparable to DocuSign's mobile experience but without the subscription.

Can I sign a password-protected PDF?

If the PDF is owner-locked (opens without a password), yes. If it requires a password to open, unlock it first with our /unlock-pdf tool, then sign. Our unlocker is also 100% local — the password never leaves your device.

What about timestamped signatures (RFC 3161 TSA)?

Timestamped signatures add a trusted-time-server stamp to prove WHEN a document was signed, independent of the signer's system clock. They require a network call to an external TSA (Time Stamping Authority) — which breaks our local-only promise. We don't ship timestamping today. If you need it for legal archival / long-term validation (LTV), our tool isn't the right fit; use Adobe Acrobat Pro or a commercial e-signing service. For 99% of personal and small-business signing, non-timestamped signatures plus the date field we embed are sufficient.

Is this the best free PDF signer?

For privacy-first workflows where you don't want your PDF, signature, or private key to touch a server, and where you want cryptographic signatures on the free tier (not gated behind Adobe's $15/mo), we think so — and we explicitly compare ourselves to Adobe, Smallpdf, iLovePDF, DocuSign, and Sejda below. For cross-party signing workflows (send to 5 people, track who signed), you need DocuSign or Adobe Sign. Pick the tradeoffs that match your actual use case.

Letšoao la PDF - Mahala, a lekunutu, a Cryptographic

Mesaeno e bonahalang LE mesaeno ea 'nete ea "cryptographic digital" (PKCS#7) - ka bobeli ke mahala, ka bobeli ba lehae, ka bobeli ba amoheloa ka molao

Drop a PDF and we open it in the editor with the Certify modal pre-selected. Draw your signature with mouse / trackpad / finger, type your name, or upload a signature image. Add reason / location / date fields. Place the visible signature anywhere on the page. We cryptographically sign the output using an in-browser-generated RSA-2048 self-signed certificate (or your own .p12 if you have one). Your PDF, your signature, and your private key never leave your device. No signup, no watermark, no per-signature charge. The only free PDF signer that does real cryptography.

100% Mahala ka ho sa feleng Ha ho akhaonto e hlokahalang 100% Sebaka sa hao Tshireletso ya Sesole

Difaele ha di tlohe sebaka sa hao

Tshireletso ya AES-256

Ha re kgone ho bona ditokomane tsa hao

Ho ha ho hlokahale tlholano

Lahlela PDF ea hau mona

kapa

PDF · Ha ho na ho kenya — ho saena le senotlolo sa lekunutu se lula sesebelisoa sa hau.

Mokhoa oa ho Saena PDF Mahala

1. Lahlela PDF ea hau

Hula PDF sebakeng se ka holimo, kapa tobetsa ho sheba. Mohlophisi o bula ka bohona ka mokhoa oa Certify o khethiloe esale pele - ha ho navigation ka har'a menyetla, ha ho na ho batla sesebelisoa sa ho saena.

2. Thala, thaepa, kapa u kenye mosaeno oa hau

Mokhoa oa Certify o fana ka litsela tse tharo ho saena e bonahalang: taka ka toeba ea hau, trackpad, kapa monoana skrineng sa ho ama; ngola lebitso la hau ka fonte ea 'nete ea ho saena; kapa kenya PNG / JPG ea tekeno ea hau e teng. Ka boraro ba bona ba hlahisa sephetho se tšoanang - khetha hore na ke efe ea tlhaho ho uena.

3. Kenya lebaka, sebaka le letsatsi

Ho latela li-PDF 2.0, li-signature tsa li-cryptographic li na le mabaka a boikhethelo (mohlala, "Ke 'na mongoli"), sebaka (mohlala "Berlin, Germany"), le libaka tsa matsatsi. Bahlahlobi ba bona tsena hammoho le boemo ba crypto. Re tlatsa letsatsi; tlatsa karolo e setseng haeba taba e potolohileng e hloka hore ho be joalo.

4. Beha tekeno le ho saena

Tobetsa kae kapa kae leqepheng ho lahlela khutlonnetsepa e bonahalang e saenneng. Hula ho fetola boholo. Tobetsa Boloka. Re hlahisa senotlolo se secha sa RSA-2048 + setifikeiti se itekenetseng sebatling sa hau, re kopanya SHA-256 hash ea mofuta oa tokomane byte, sephuthela PKCS#7 blob ea data e saennoeng, ebe re e kenya ho PDF. Faele e saenneng e khoasolla hang-hang.

Hobaneng Sena e le Sets'oants'o sa Mahala sa PDF sa Mahala

100% ea lehae - ha ho na seabo sa seva

PDF ea hau, tshaeno ea hau e hutsoeng, setifikeiti sa hau se kentsoeng, senotlolo sa hau sa lekunutu - ha ho le e 'ngoe ea eona e amang seva. Bapisa: Adobe, Smallpdf, iLovePDF, DocuSign, le Sejda kaofela li kenya tsohle. Ha tokomane e le konteraka e saennoeng, NDA, lekhetho, kapa tokollo ea bongaka, e bohlokoa ho feta kae kapa kae tepong.

cryptography ea 'nete, tier ea mahala

Smallpdf le iLovePDF li u fa mosaeno o bonahalang maemong a bona a mahala - mongolo o leqepheng le se nang bopaki ba sephiri. Ke "signature ea elektroniki", e fokolang ka molao. Re u fa li-signature tsa dijithale tsa PKCS#7 / CMS mahala, tse tšoanang le Adobe Acrobat Pro e sebelisoang (e kentsoeng ka mor'a peeletso ea $ 15/mo moo).

Lisetifikeiti tsa ho ingolisa hang hang

Boholo ba li-cryptographic signing li batla setifikeiti se fanoeng esale pele. Re hlahisa setifikeiti se secha sa RSA-2048 le setifikeiti sa X.509 se ingoletseng ho sebatli sa hau ka Web Crypto API - ho seta lefela. Kenya .p12 / .pfx haeba u batla ho tšepa motho oa boraro; ho seng joalo setifikeiti se itekenetseng se lekane bakeng sa ts'ebeliso ea motho ka mong le tšebetso ea khoebo e nyane.

E bonahalang + cryptographic ka pase e le 'ngoe

Lisebelisoa tse ngata tsa mahala li u qobella ho khetha e le 'ngoe. Rea li bokella: tshaeno ea hau e bonahalang e huleloa e phela leqepheng 'ME PDF e na le tekeno ea sephiri e pakang hore na ke mang ea saenneng le hore tokomane ha e so fetoloe. Ka bobeli ka pasa e le 'ngoe ea ho boloka.

Netefatso e iketsahallang e le teng

Lahlela PDF e saennoeng 'me re bonts'a banner ea netefatso - e nepahetseng / e sa sebetseng / e sa tšepahaleng-e fanang ka lintlha - haufi le lintlha tsa setifikeiti sa motho ea saenneng. Hangata bahlolisani ba bonts'a setšoantšo se saenneng feela; o tlameha ho e nka ka tumelo.

Liketane tse nang le li-signature tse ngata

Saena, romela ho mphato, ba saena le ho khutlisa. PDF's byte-range model e ts'ehetsa palo efe kapa efe ea li-signature tse latellanang; mosaeno o mong le o mong o mocha o koahela tse fetileng, o hlahisa ketane e ka netefatsoang. Mohlophisi oa rona o sebetsana le ho saena hape ntle le ho senya tekeno e fetileng.

Kannete Ho Lokolohile, Ka ho sa Feleng

Ha ho na teko, ha ho na maemo a holimo, ha ho tefiso ea ho saena ka 'ngoe. Adobe Acrobat Pro ke $15/mo; DocuSign Personal ke $ 15 / mo; Smallpdf Pro ke $12/modi. Kaofela ha bona ba kenya faele ea hau kapa ba hloka peeletso bakeng sa ho saena ka mokhoa oa cryptographic. Re tšehelitsoe ke lipapatso 'me re lokolohile ka ho sa feleng.

Ha ho na ak'haonte, ha ho lengolo-tsoibila

Qala ho saena hanghang. Ha ho ngolisoe, ha ho na lengolo-tsoibila, ha ho karete ea mokoloto.

E sebetsa ntle le inthanete

Hang ha sehlophisi se kentsoe, u ka hakolla inthaneteng ebe u tsoela pele ho saena. E ntle bakeng sa likonteraka tse hlokolosi, li-NDA, le litokomane tsa botho tsa lichelete.

Electronic Signatures vs. Digital Signatures — Ke Eng Hantle-ntle e Tšehetsang

Saeno ea elektroniki (SES - E bonolo)

Letšoao lefe kapa lefe le bonahalang tokomaneng ea dijithale: lebitso le tlatsitsoeng, mongolo o tolotsoeng, tekeno ea enke e kolobisitsoeng, lebokose la "Kea lumela". E amoheloa ka molao libakeng tse ngata tsa khoebo ea letsatsi le letsatsi (sehlopha sa EU eIDAS SES, US ESIGN / UETA, UK Electronic Communications Act) empa ho bonolo ho tseka haeba motho ea saenneng hamorao a hana ho saena - ha ho na bopaki ba sephiri ba hore na ke mang ea hlahisitseng letšoao. Mokhoa oa rona oa "bonahalang feela" o hlahisa sena.

Saeno ea elektroniki e tsoetseng pele (AES)

Karolo ea 2 ea EU eIDAS regulation. E tlameha (a) ho tsebahatsa motho ea saenneng ka tsela e ikhethang, (b) ho ba tlas'a taolo ea motho ea saenang feela, (c) ho lemoha tšitiso ea kamora ho saena, (d) ho etsoa ho sebelisoa data eo motho ea saenang a ka e bolokang tlas'a taolo ea hae. Tlhahiso ea rona ea "cryptographic" (PKCS#7 holim'a SHA-256 e nang le RSA-2048 le senotlolo sa poraefete se hlahisoang sebakeng sa hau sa polokelo ea Crypto e sa ntšitsoeng) e finyella litekanyetso tsohle tse 'nè - u ka kopa boemo ba AES bakeng sa PDF e saennoeng mona.

Saeno ea elektroniki e tšoanelehang (QES)

Karolo ea 3 ea EU eIDAS regulation. AES hammoho le setifikeiti se tšoanelehang se tsoang ho Trust Service Provider (TSP) lethathamong le tšeptjoang la EU, hammoho le sesebelisoa se tšoanelehang sa ho theha mats'oao (HSM kapa smartcard). QES e lekana ka molao le tekeno ea enke e metsi ho pholletsa le EU kaofela. Ha re hlahise QES hobane ho phalla ha sebatli feela ha ho khonehe ho fihlela litlhoko tsa sesebelisoa sa ho theha signature tse thehiloeng ho Hardware - o hloka sesebelisoa se ikemiselitseng sa ho saena kapa cloud HSM. Haeba nyeoe ea hau ea ts'ebeliso e hloka QES (likonteraka tse ngolisitsoeng ka molao, liindasteri tse ling tse laoloang), u hloka Adobe Sign, DocuSign EU Qualified, kapa TSP ea lehae.

Molao oa US (ESIGN / UETA)

US federal ESIGN Act (2000) le state adoption ya UETA e nka boholo ba mesaeno ya elektroniki e lekana le wet-inki - ntle le leano la EU. Hore tekeno e ka phethahatsoa: (a) mahlakore ka bobeli a tlameha ho lumela ho saena ka mokhoa oa elektroniki, (b) tekeno e tlameha ho etsoa ka boomo, (c) lirekoto li tlameha ho bolokoa. Tsena tsohle lia sebetsa; tlhahiso ea rona e kopana le tsona. Mefuta e meng ea litokomane e betliloeng (lithato, litaba tsa molao oa lelapa, litokomane tse ling tsa lekhotla) - hlahloba boemo ba hau.

PDF Edit khl Adobe, Smallpdf, iLovePDF, DocuSign, Sejda

Sesebelisao	PDF Edita	Adobe	Smallpdf	iLovePDF	DocuSign	Sejda
Lifaele tse entsweng ho seva?	No — 100% local	Ee	Ee	Ee	Ee	Ee
Li-signature tsa Cryptographic ho tier ea mahala?	Yes — PKCS#7 / CMS	E lefelletsoe ($15/mo)	E lefelletsoe ($12/mo)	Lefile	E lefelletsoe ($15/mo)	Lefile
Mesaeno e bonoang mahala?	Yes	Ee	2/letsatsi mahala	Boemo ba mahala bo lekanyelitsoe	Lefile	Boemo ba mahala bo lekanyelitsoe
Setifikeiti sa ho ingolisa ka har'a sebatli?	Yes — auto	E hloka ho kenya	Che	Che	Che	Che
Kenya ea hau .p12 / .pfx?	Yes	Ee (e lefelletsoe)	Che	Che	Ee (e lefelletsoe)	Che
Akhaonto e hlokahala?	Never	Boemo ba mahala bo lekanyelitsoe	Ho hlokahala lengolo-tsoibila	Boemo ba mahala bo lekanyelitsoe	Ho hlokahala lengolo-tsoibila	Boemo ba mahala bo lekanyelitsoe
Watermark ka output?	No	Che	Che	Che	Che	Che
E sebetsa offline ka morago ha ho hloniloeng?	Yes	Che	Che	Che	Che	Che
Netefatsa mesaeno e kenang?	Yes — auto banner	Ee	E sa fellang	E sa fellang	Ee	E sa fellang
Litšenyehelo tsa selemo tsa ho saena ka mokhoa oa cryptographic?	$0	~$180/yr	~$144/yr	~$80/yr	~$180/yr	~$80/yr

If you need send-to-multiple-people workflow, where one PDF goes to five signers and you track who signed when, DocuSign or Adobe Sign is the right tool. For you signing your own documents — contracts you received, vendor agreements, NDAs, tax forms — we cover the exact same cryptographic capability for free, without uploading anything.

Ke Mang ea Tšoaeang PDFs Joalo?

Basebetsi ba ikemetseng ba saena likonteraka

Moreki o romella SOW kapa mohlokomeli. U saena, setempe sa crypto, romella hape. Ha ho na ho kenya ho DocuSign, ha ho li-imeile tsa "teko ea mahala", ha ho ngoliso ea Adobe - 'me tekeno e matla ka molao ho feta JPG scribble hobane e tšehetsoa ke PKCS#7 crypto.

HR le liforomo tsa mosebetsi

Fana ka mangolo, li-NDA, lipakete tsa ho palama, li-W-9, liforomo tsa ho thibela lekhetho. Ho na le maikutlo a hore ha hoa lokela ho kenya inthaneteng sebakeng sa marang-rang sa mahala sa ho saena. Saena sebakeng sa heno, romella hape ka lengolo-tsoibila.

Litokollo tsa bongaka le liforomo tsa HIPAA

Litumello tse saenneng bakeng sa lirekoto tsa bongaka, likopo tsa inshorense, kapa liforomo tsa tokollo ea liteko. Litaba tse koahetsoeng ke HIPAA ha lia lokela ho kenngoa ho li-server tsa motho eo u sa mo tsebeng. Litaba tsa ho saena sebakeng sa heno feela.

ngollano ea molao

Mangolo a boitlamo, litumellano tsa tharollo, liphatlalatso, lipolelo tse hlapanyelitsoeng. Moo ho nang le tokelo, tokomane ha ea lokela ho siea sesebelisoa sa hau nakong ea ho saena. Phallo ea rona ea lehae e boloka seo.

Litumellano tsa thekiso ea matlo le khiriso

Likonteraka tsa khiriso, liphetoho tsa khiriso, liphatlalatso tsa thepa. Saena le ho khutla ntle le ho ingolisa bakeng sa sethala se seng sa ho saena. Sehlopha se fumana PDF e netefalitsoeng e netefalitsoeng ka mokhoa o hlakileng eo ba ka e bulang ho sebali leha e le sefe.

'Muso le mefuta ea lekhetho

Liforomo tsa IRS (W-9, 1099), likopo tsa mmuso, litokomane tsa bojaki. Mekhatlo e mengata e amohela PKCS#7 e saenneng PDFs. Ho saena sebakeng sa heno ho qoba ho kenya litokomane tsa boitsebiso tsa bohlokoa.

Bangoli le ba nang le litokelo

Saena mosebetsi oa dijithale ho netefatsa bongoli ka nako e itseng. Saeno ea PKCS#7 + setempe sa nako ho PDF e saennoeng ke rekoto e tšoarellang ea nako e telele, e tšehelitsoeng ke senotlolo sa hau sa lekunutu.

Liqeto tsa boto ea khoebo

Metsotso ea boto, liqeto tsa tumello, lithuso tsa khetho ea setoko. Tšehetso ea ketane ea batho ba bangata e lumella batsamaisi ho saena ka tatellano ntle le ho fetisetsa PDF ka leru la motho oa boraro.

Litokomane tsa nako e telele

Saena PDF ea bohlokoa kajeno ka signature e ngotsoeng ka setempe ea letsatsi. Boloka sebakeng sa heno. Lilemo hamorao, mang kapa mang ea nang le faele o ntse a ka netefatsa hore e saennoe ke mong'a senotlolo sa hau sa lekunutu 'me ha e so ka e fetoloa ho tloha ka nako eo. (Bakeng sa tšebetso ea netefatso ea nako e telele e nang le litempe tsa linako tse tšepahalang, bona karolo ea FAQ ho LTV.)

Saena PDF ho iPhone, Android, Mac, Windows, le Chromebook

Saena ea rona ea PDF e sebetsa sesebelisoa se seng le se seng se nang le sebatli sa sejoale-joale - Windows, Mac, Linux, Chromebook, iPad, iPhone, le Android. Ho iPad Pro e nang le Pencil ea Apple, ho taka tekeno ea hau ho utloahala hantle joalo ka sesebelisoa sa selefouno sa DocuSign, o tlose peeletso ebe o tlosa ho kenya. Ha ho na app e kenyang, ha ho li-plugins, ha ho na litokelo tsa admin. Ha leqephe le se le kentse u ka itokolla inthaneteng 'me u tsoela pele ho saena - ntho e' ngoe le e 'ngoe e tsamaisoa sebakeng sa heno ka Web Crypto API.

Ho Saena ho Thehiloeng ho Sebatli sa Cryptographic PDF ho sebetsa Joang?

Ha u tobetsa Boloka, re hlahisa li-keypair tse ncha tsa RSA-2048 sebatli sa hau re sebelisa Web Crypto API (crypto.subtle.generateKey) - senotlolo sa lekunutu se lula polokelong e ke keng ea ntšoa 'me ha e khone ho romelloa kantle ho naha. Re etsa setifikeiti sa X.509 se itekenetseng ka lebitso leo u le khethileng. PDF e lokiselitsoe ka sets'oants'o se se nang letho /Sig kahare ho lebala la /AcroForm. Re kopanya SHA-256 hash ea mofuta oa byte ea tokomane ho sa kenyeletsoe setšoantšisi. Hashe e tekenetsoe ka senotlolo sa hau sa lekunutu ka crypto.subtle.sign (RSA-PKCS1-v1_5 le SHA-256). Re aha sebopeho sa PKCS#7 / CMS SignedData se nang le tekeno, setifikeiti sa hau, nako ea ho saena, le metadata efe kapa efe ea lebaka/sebaka. PKCS#7 blob e kentsoe DER-encoded mme e kentsoe karolong ea PDF's /Sig. Lifaele lia khoasolla. Sebali se seng le se seng sa sejoale-joale sa PDF (Adobe, Chrome, Edge, Foxit, Preview, Firefox) se bala sebopeho sa PKCS#7 ha se butsoe, se pheta hashi ea tokomane, se netefatsa tekeno khahlano le setifikeiti se kentsoeng, 'me se hlahisa beche ea netefatso. Li-crypto kaofela li sebetsa ho sebatli sa hau - ha ho seva, ha ho upload, ha ho telemetry.

Lipotso Tse Botsoang Hangata

Ke saena PDF joang mahala?

Lahlela PDF ea hau leqepheng le ka holimo. Mohlophisi o bula ka mokhoa oa Certify o khethiloeng esale pele. Thala, thaepa, kapa u kenye tekeno ea hau. Tobetsa leqephe ho e beha. Tobetsa Boloka. E lokolohile, ea lehae, ha e na watermark.

Ke kenya tekeno joang ho PDF?

Same flow — theola, hula, sebaka, boloka. "Saena" le "eketsa signature" li hlahisa sephetho se tšoanang sesebelisoa sa rona.

Na mesaeno ee e tlama ka molao?

E, libakeng tse ngata. Tlhahiso ea rona ea "cryptographic" e kopana le litekanyetso tsa EU eIDAS "Advanced Electronic Signature" mme e khotsofatsa litlhoko tsa US ESIGN / UETA. Bakeng sa litokomane tse ngolisitsoeng ka molao kapa ts'ebetso e khethehileng ea QES u hloka setifikeiti se fanoeng ke TSP seo re ke keng ra se hlahisa ka har'a sebatli - sebelisa Adobe Sign kapa TSP ea naha.

Na PDF eaka e kentsoe?

Che. Ho saena ho etsahala ho sebatli sa hau ka botlalo. PDF ea hau, tekeno, le senotlolo sa lekunutu ha li ame li-server tsa rona.

Phapano ke efe lipakeng tsa li-signature tsa elektroniki le tsa dijithale?

Electronic = letšoao leha e le lefe le bonahalang (mongolo, lebitso le tlatsitsoeng, setšoantšo). Digital = cryptographic operation e pakang boitsebiso + botšepehi. Re etsa ka bobeli, re phuthetsoe ka tekeno e le 'ngoe. Boholo ba bahlolisani ba mahala ba etsa elektronike feela.

PKCS#7 ke eng?

Khouto e tloaelehileng ea data e saenneng ka PDFs. Sebali se seng le se seng sa sejoale-joale sa PDF se bala PKCS#7 / CMS ka tlhaho. Tlhahiso ea rona e tsamaellana ka mokhoa o ikhethileng - sebopeho se tšoanang Adobe Acrobat Pro e sebelisa.

Na PDF e saennoeng e tla sebetsa ho Adobe?

Ee. Adobe Acrobat Reader / Pro, Chrome, Edge, Firefox, Foxit, macOS Preview - kaofela li netefatsa lipeeletso tsa rona. Li-cert tse saenneng li bontša temoso ea "mosebelisi ea sa tsejoeng" (boitšoaro bo nepahetseng); kenya .p12 ho tsoa ho CA e tšepahalang bakeng sa netefatso ea beche e tala.

A na nka kenya setifikeiti sa ka se seng se ntse se le teng?

Ee. Ho Certify modal khetha "Sebelisa setifikeiti se teng" 'me u kenye faele ea hau ea .p12 kapa .pfx (ka password haeba e teng). Setifikeiti se fetisoa sebakeng sa heno - ha se fetisoe.

Na batho ba bangata ba ka saena PDF e tšoanang?

E, ka tatellano. Saena le ho khoasolla. Motho ea e amohelang o e bula mona ebe o saena hape. Mosaeno o mong le o mong o akaretsa tse fetileng - ketane e ka netefatsoang.

A na nka saena PDF mohaleng oaka?

Ee. E sebetsa ho iPhone Safari, iPad (haholo-holo ka Apple Pencil - e ikutloa joalo ka DocuSign Mobile), Android Chrome. Thala ka monoana.

A na nka saena PDF e sirelelitsoeng ka password?

E, haeba mong'a ntlo a notletsoe, che haeba mosebelisi a notletsoe. Haeba mong'a ntlo a notletsoe, ho saena ho sebetsa ka kotloloho. Haeba mosebelisi e notletsoe (password e hlokahalang ho bula), notlolla ka /unlock-pdf pele. Lisebelisoa ka bobeli li sebetsa sebakeng sa heno.

E sebetsa ntle le inthanete?

E, hang ha mohlophisi a kentse. Enjine ea ho saena e sebetsa ho sebatli sa hau.

Ho thoe'ng ka li-signature tse behiloeng ka nako (RFC 3161)?

Ha e so tšehetsoe - litempe tsa linako li hloka mohala oa marang-rang ho TSA ea kantle e robang ts'episo ea rona ea lehae feela. Bakeng sa tšebetso ea nako e telele ea netefatso (LTV), sebelisa Adobe Acrobat Pro kapa tšebeletso ea ho saena ea khoebo.

Na motho ea netefatsang o tla bona setifikeiti sa ka sa boithaopo se sebetsa?

Che - ba tla bona temoso "ea saenneng e sa tsejoeng" hobane li-cert tse saenneng ha lia ts'oaroa ke ketane e tšepahalang ea CA. Tshaeno ka boyona E nepahetse ka mokhoa o hlakileng - ke tseko ea boitsebiso e hlokang ho tšepa motho oa boraro. Bakeng sa tšebeliso ea botho ho lekane; bakeng sa ts'ebeliso ea molao/khoebo, kenya .p12 ho tsoa ho CA e tšepahalang.

Na moamoheli a ka hlophisa PDF e saennoeng?

Che - haeba ba e hlophisa, signature ea "cryptographic" e ea robeha 'me verifier efe kapa efe e bona "signature e fosahetse, tokomane e fetotsoeng kamora ho saena". Sena ke hantle thepa ea ho lemoha lintho tse senyang e etsang hore mesaeno ea dijithale e be le moelelo ka molao.

Na mosaeno oa ka o tla ba le watermark?

Che. PDF ea hau e saenneng e na le tshaeno ea hau hantle — ha ho litempe tsa "Saena ka FreeTool", ha ho lipapatso, ha ho na thekiso. Seo u se saenang ke sona se rometsoeng.

Ho na le moeli oa boholo ba faele?

Ha ho moeli oa maiketsetso. Memori ea sesebelisoa ke eona feela siling.

Na enoa ke motho ea saenneng ka ho fetesisa oa mahala oa PDF?

E, bakeng sa ts'ebetso ea boinotšing-pele le bakeng sa ho fumana li-signature tsa cryptographic sethaleng sa mahala, re nahana joalo. Bakeng sa 'mino oa mekha ea mekha e mengata (romela ho ba saenneng ba 5, boemo ba pina), DocuSign kapa Adobe Sign ke sesebelisoa se nepahetseng - sehlopha se fapaneng.

About this tool: PDF Edit is built by a small independent team who were tired of PDF tools that required accounts, uploaded files to servers we didn't control, and gated cryptographic signing behind subscriptions. Everything here runs in your browser — your PDF, your signature drawing, and your private key stay on your device. The signing engine uses the Web Crypto API for RSA key generation and hashing, and produces PKCS#7 / CMS signatures that validate in every modern PDF viewer. Free forever, ad-supported.

Last updated: 2026-05-13