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.

Banye PDF - efu, Nkeonwe, Cryptographic

mbinye aka a na-ahụ anya na ezigbo mbinye aka dijitalụ cryptographic (PKCS#7) - ha abụọ n'efu, ma mpaghara, ma nke iwu kwadoro.

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% N'efu Ruo Mgbe Ebighị Ebi Enweghị Akaụntụ Achọrọ 100% na ngwaọrụ gị Izo ya ezo-ọkwa agha

Faịlụ anaghị ahapụ ngwaọrụ gị

AES-256 izo ya ezo

Anyị enweghị ike ịhụ akwụkwọ gị

Enweghị njikọ achọrọ

Tuba PDF gị ebe a

ma ọ bụ

PDF · Enweghị ebugo — mbinye aka na igodo nzuzo nọrọ na ngwaọrụ gị.

Otu esi edebanye aha PDF n'efu

1. Tuba PDF gị

Dọrọ PDF na mpaghara dobe n'elu, ma ọ bụ pịa ka ịchọọ. Ndị nchịkọta akụkọ na-emepe na-akpaghị aka na Asambodo modal tupu ahọpụtara - enweghị igodo site na menus, ọ dịghị achọ ngwá ọrụ mbinye aka.

2. See, pịnye, ma ọ bụ bulite mbinye aka gị

Usoro asambodo na-enye ụzọ atọ maka mbinye aka a na-ahụ anya: were òké, trackpad, ma ọ bụ mkpịsị aka gị sere na ihuenyo mmetụ; pịnye aha gị na mkpụrụedemede mbinye aka n'ezie; ma ọ bụ bulite PNG / JPG nke mbinye aka gị dị ugbu a. Ha atọ na-arụpụta otu ihe a na-ahụ anya - họrọ nke kacha mma maka gị.

3. Tinye ihe kpatara ya, ebe, na ụbọchị

Kwa PDF 2.0 nkọwapụta, mbinye aka cryptographic nwere nhọrọ nhọrọ (dịka "Abụ m odee"), ọnọdụ (dịka "Berlin, Germany"), na mpaghara ụbọchị. Ndị nyocha na-ahụ ihe ndị a n'akụkụ ọkwa crypto. Anyị na-emeju ụbọchị ahụ na-akpaghị aka; dejupụta nke fọdụrụ ma ọ bụrụ na ihe ndị gbara ya gburugburu chọrọ ya.

4. Debe mbinye aka na akara

Pịa ebe ọ bụla na ibe ka idobe akụkụ anọ mbinye aka a na-ahụ anya. Dọrọ ka ọ gbanwee nha. Pịa Chekwa. Anyị na-ewepụta igodo RSA-2048 ọhụrụ + nke ejiri aka ya bịa na ihe nchọgharị gị, gbakọọ hash SHA-256 nke oke byte akwụkwọ, kpochie blọb data PKCS#7 bịanyere aka na ya, wee tinye ya na PDF. Budata faịlụ mbinye aka ozugbo.

Ihe kpatara nke a ji bụrụ onye nbinye aka n'efu PDF

100% mpaghara - enweghị itinye aka na sava

PDF gị, mbinye aka gị sere, akwụkwọ ebugoro gị, igodo nzuzo gị - ọ nweghị nke metụrụ ihe nkesa aka. Tulee: Adobe, Smallpdf, iLovePDF, DocuSign, na Sejda na-ebugo ihe niile. Mgbe akwụkwọ ahụ bụ nkwekọrịta mbinye aka, NDA, nkwụghachi ụtụ, ma ọ bụ ntọhapụ ahụike, nke dị mkpa karịa ebe ọ bụla ọzọ na webụ.

Ezigbo nzuzo, ọkwa efu

Smallpdf na iLovePDF na-enye gị mbinye aka a na-ahụ anya na ọkwa ha efu - ihe odide na ibe na-enweghị ihe akaebe cryptographic. Nke ahụ bụ "mbinye aka elektrọnik", na-esighị ike n'ụzọ iwu. Anyị na-enye gị PKCS # 7 / CMS mbinye aka dijitalụ n'efu, otu ọkọlọtọ Adobe Acrobat Pro na-eji (gbapụtara n'azụ ndenye aha $ 15 / mo ebe ahụ).

Asambodo ejiri aka ya bịa ozugbo

Ọtụtụ mbinye aka n'aka cryptographic chọrọ asambodo enyerela mbụ. Anyị na-ewepụta keypair RSA-2048 ọhụrụ yana asambodo X.509 bịanyere aka na ya na ihe nchọgharị gị site na Weebụ Crypto API — ntọlite efu. Bulite .p12 / .pfx gị dị ma ọ bụrụ na ịchọrọ ntụkwasị obi nke ndị ọzọ; ma ọ bụghị ya, akwụkwọ ikike nke aka ya zuru oke maka ojiji nkeonwe yana obere ọrụ azụmahịa.

A na-ahụ anya + cryptographic n'otu ngafe

Ọtụtụ ngwaọrụ efu na-amanye gị ịhọrọ otu. Anyị na-achịkọta ha: mbinye aka gị a na-ahụ anya na-ebi na ibe na PDF na-ebu mbinye aka n'aka nke na-egosi onye bịanyere aka na ya yana na agbanwebeghị akwụkwọ ahụ. Ha abụọ n'otu ngafe nchekwa.

Nnwale akpaaka na-ebu

Wetuo PDF bịanyere aka na ya wee gosi ọkọlọtọ nkwenye - nke ziri ezi / adịghị mma / onye na-enyeghị ntụkwasị obi - n'akụkụ nkọwa akwụkwọ ntinye aka. Ndị asọmpi na-egosipụtakarị naanị onyonyo mbinye aka; ị ga-ewere ya na okwukwe.

Agbụ nke ọtụtụ mbinye aka

Banye aka, ziga na ndị otu, ha binye aka ma zigaghachi. Ụdị byte-oke nke PDF na-akwado ọnụọgụ ọ bụla nke mbinye aka usoro; mbinye aka ọhụrụ ọ bụla na-ekpuchi ndị bu ụzọ, na-emepụta agbụ a na-ekwenye ekwenye. Onye nchịkọta akụkọ anyị na-ejikwa mbinye aka ọzọ na-emebighị mbinye aka gara aga.

N'ezie Free, ruo mgbe ebighị ebi

Enweghị nnwale, enweghị ọkwa adịchaghị, enweghị ụgwọ mbinye aka ọ bụla. Adobe Acrobat Pro bụ $15 / mo; DocuSign Personal bụ $15 / mo; Smallpdf Pro bụ $12 / mo. Ha niile bulite faịlụ gị ma ọ bụ chọọ ndenye aha maka ntinye aka cryptographic. Anyị na-akwado mgbasa ozi yana nweere onwe ya ruo mgbe ebighị ebi.

Enweghị akaụntụ, enweghị email

Bido binye aka ozugbo. Enweghị ndebanye aha, enweghị njide email, enweghị kaadị kredit.

Na-arụ ọrụ na-anọghị n'ịntanetị

Ozugbo onye ndezi bujuru, ị nwere ike ịkwụpụ na ịntanetị wee nọgide na-edebanye aha. Ọ dị mma maka nkwekọrịta nwere mmetụta, NDA, na akwụkwọ ego nkeonwe.

mbinye aka elektrọnik vs. Digital mbinye aka - Gịnị n'ezie jigidere

mbinye aka elektrọnik (SES - Dị Mfe)

Akara ọ bụla a na-ahụ anya na akwụkwọ dijitalụ: aha e depụtara, ihe odide eserese, mbinye aka ink mmiri a na-enyocha, igbe nlele "Ekwenyere m". A nabatara n'ụzọ iwu kwadoro n'ọtụtụ ikike maka azụmahịa kwa ụbọchị (EU eIDAS SES tier, US ESIGN / UETA, UK Electronic Communications Act) mana ọ dị mfe ịsọ mpi ma ọ bụrụ na onye nbinye aka jụ ịbịanye aka - enweghị ihe akaebe cryptographic onye mepụtara akara ahụ. Ụdị "nanị a na-ahụ anya" na-emepụta nke a.

Akara aka eletrọnịkị dị elu (AES)

EU eIDAS ụkpụrụ nke ọkwa 2. Ga- (a) ịmata onye nbinye aka n'ụzọ pụrụ iche, (b) nọ n'okpuru njikwa naanị ya, (c) chọpụta mmebi ibinye aka n'akwụkwọ, (d) emepụtara site na iji data onye nbinye aka nwere ike idowe n'okpuru njikwa naanị ha. Ihe nrụpụta cryptographic anyị (PKCS#7 n'elu SHA-256 nwere RSA-2048 yana igodo nzuzo emepụtara na mpaghara na nchekwa Weebụ Crypto anaghị ewepụ) na-ezute usoro anọ niile - ị nwere ike ị nweta ọkwa AES maka PDF bịanyere aka na ya ebe a.

mbinye aka eletrọnịkị tozuru oke (QES)

EU eIDAS regulation tier 3. AES gbakwunyere asambodo tozuru oke sitere na onye na-enye ọrụ ntụkwasị obi (TSP) na ndepụta ntụkwasị obi EU, gbakwunyere ngwaọrụ okike mbinye aka tozuru oke (HSM ma ọ bụ smartcard). QES dabara n'ụzọ iwu na mbinye aka ink mmiri n'ofe EU dum. Anyị anaghị emepụta QES n'ihi na ọbịbịa naanị ihe nchọgharị enweghị ike izute ngwaọrụ mbinye aka sitere na ngwaike chọrọ - ị chọrọ ngwaọrụ mbinye aka raara onwe ya nye ma ọ bụ igwe ojii HSM. Ọ bụrụ na ikpe ojiji gị chọrọ QES (nkwekọrịta ndị edobere aha, ụfọdụ ụlọ ọrụ ahaziri ahazi), ị ga-achọ akara Adobe, DocuSign EU Qualified, ma ọ bụ TSP mpaghara.

Iwu US (ESIGN/UETA)

US Federal ESIGN Act (2000) na steeti UETA nkuchi na-emeso ọtụtụ mbinye aka eletrọnịkị ka iwu dabara na ink mmiri mmiri - na-enweghị atụmatụ nke EU. Maka mbinye aka ka ọ bụrụ nke a ga-amanye: (a) akụkụ abụọ ahụ ga-ekwenyerịrị ịbịanye aka na eletrọnịkị, (b) mbinye aka ga-abụrịrị ụma, (c) ndekọ ga-edoberịrị. Ihe ndị a niile na-arụ ọrụ; mmepụta anyị na-ezute ha. A na-akpụpụta ụfọdụ ụdị akwụkwọ akọwapụtara (ọchịchọ, ihe gbasara iwu ezinụlọ, ụfọdụ ntinye akwụkwọ) - lelee steeti gị.

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

Njirimara	PDF Edit	Adobe	Smallpdf	iLovePDF	DocuSign	Sejda
Ebulitere faịlụ na sava?	No — 100% local	Ee	Ee	Ee	Ee	Ee
mbinye aka Cryptographic na ọkwa efu?	Yes — PKCS#7 / CMS	Akwụ ụgwọ ($15/mo)	Akwụ ụgwọ ($12/mo)	Akwụ ụgwọ	Akwụ ụgwọ ($15/mo)	Akwụ ụgwọ
mbinye aka a na-ahụ anya n'efu?	Yes	Ee	2 / ụbọchị n'efu	Free tier Limited	Akwụ ụgwọ	Free tier Limited
Asambodo mbinye aka na ihe nchọgharị onwe ya?	Yes — auto	Achọrọ mbubata	Mba	Mba	Mba	Mba
Bulite .p12 / .pfx nke gị?	Yes	Ee (akwụ ụgwọ)	Mba	Mba	Ee (akwụ ụgwọ)	Mba
Achọrọ akaụntụ?	Never	Free tier Limited	Achọrọ email	Free tier Limited	Achọrọ email	Free tier Limited
Akara mmiri na mmịpụta?	No	Mba	Mba	Mba	Mba	Mba
Ọ na-arụ ọrụ na mpụga ịntanetị mgbe ebubatara?	Yes	Mba	Mba	Mba	Mba	Mba
Nyochaa mbinye aka mbata?	Yes — auto banner	Ee	Akụkụ akụkụ	Akụkụ akụkụ	Ee	Akụkụ akụkụ
Ọnụ ego kwa afọ maka ntinye aka 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.

Kedu onye na-edebanye aha PDF dị ka nke a?

Ndị nweere onwe ha na-abịanye aka na nkwekọrịta

Onye ahịa na-eziga SOW ma ọ bụ ihe ndebe. Ị bịanyere aka n'akwụkwọ, crypto-stamp, zighachi azụ. Enweghị ebugo na DocuSign, enweghị ozi ịntanetị "nnwale efu", enweghị ndenye aha Adobe - yana mbinye aka siri ike n'ụzọ iwu karịa akwụkwọ edemede JPG n'ihi na PKCS#7 crypto na-akwado ya.

HR na ụdị ọrụ

Nye akwụkwọ ozi, NDA, ngwugwu onboarding, W-9s, ụdị ndochi ụtụ isi. Enwere mmetụta zuru oke na ibugo na saịtị ntinye aka n'efu adịghị mma. Banye na mpaghara, zigaghachi site na email.

Mwepụta ọgwụ na ụdị HIPAA

Ikike mbinye aka maka ndekọ ahụike, nkwupụta mkpuchi, ma ọ bụ ụdị ntọhapụ ule. E kwesịghị ibugo ọdịnaya kpuchiri HIPAA na sava onye ọbịbịa. Okwu mbinye aka naanị mpaghara.

Akwụkwọ ozi iwu

Akwụkwọ ozi ntinye aka, nkwekọrịta nkwekọrịta, nkwupụta, nkwupụta iyi. Ebe ihe ùgwù jikọtara, akwụkwọ ahụ ekwesịghị ịhapụ ngwaọrụ gị mgbe ị na-edebanye aha. Usoro nke ime obodo na-echekwa nke ahụ.

Nkwekọrịta ụlọ na mgbazinye

Nkwekọrịta mgbazinye, mmezigharị mgbazinye, mkpughe ihe onwunwe. Banye ma laghachi na-edebanyeghị aha maka ikpo okwu mbinye aka ọzọ. Ndị otu ahụ na-enweta akara cryptography nke ejirila PDF bịanyere aka na ya nke ha nwere ike imepe na onye na-ekiri ọ bụla.

Ụdị gọọmentị na ụtụ isi

Ụdị IRS (W-9, 1099), ngwa gọọmentị, akwụkwọ mbata na ọpụpụ. Ọtụtụ ụlọ ọrụ na-anabata PKCS#7 bịanyere aka na PDFs. Ntinye aka mpaghara na-ezere ibugo akwụkwọ njirimara nwere mmetụta.

Ndị ode akwụkwọ na ndị ji ikike

Banye aka n'ọrụ dijitalụ iji gosi na ọ bụ onye edemede n'otu oge. mbinye aka PKCS#7 + timestamp dị na PDF bịanyere aka na ya bụ ndekọ na-adịgide adịgide, nke igodo nzuzo gị kwadoro.

Mkpebi bọọdụ ụlọ ọrụ

Nkeji bọọdụ, mkpebi nkwenye, onyinye nhọrọ ngwaahịa. Nkwado yinye nke ọtụtụ mbinye aka na-eme ka ndị nduzi bịanye aka n'usoro n'ebughị ụzọ ziga PDF site na igwe ojii nke ndị ọzọ.

Ebe nchekwa akwụkwọ ogologo oge

Binye aka PDF dị mkpa taa na mbinye aka cryptographic akara ụbọchị. Na-echekwa na mpaghara. Ọtụtụ afọ ka e mesịrị, onye ọ bụla nwere faịlụ ahụ ka nwere ike ịchọpụta na onye ji igodo nzuzo gị bịanyere aka na ya ma agbanwebeghị ya kemgbe. (Maka usoro nkwado ogologo oge na-arụ ọrụ yana akara oge ntụkwasị obi, lee ngalaba FAQ na LTV.)

Banye aka PDF na iPhone, Android, Mac, Windows, na Chromebook

Onye nbinye aka anyị PDF na-arụ ọrụ na ngwaọrụ ọ bụla nwere ihe nchọgharị ọgbara ọhụrụ - Windows, Mac, Linux, Chromebook, iPad, iPhone, na Android. Na iPad Pro na Apple Pencil, ịbịanye mbinye aka gị na-adị ka ngwa mkpanaaka DocuSign, na-ewepu ndenye aha na mwepu nbudata. Enweghị ngwa arụnyere, enweghị plugins, enweghị ikike nchịkwa. Ozugbo ibe ahụ bujuru, ị nwere ike ịkwụsị ịntanetị wee gaa n'ihu ịbanye - ihe niile na-aga na mpaghara site na Weebụ Crypto API.

Kedu otu mbinye aka Cryptographic PDF dabere na ihe nchọgharị si arụ ọrụ?

Mgbe ị pịrị Chekwa, anyị na-ewepụta igodo RSA-2048 ọhụrụ na ihe nchọgharị gị site na iji Weebụ Crypto API (crypto.subtle.generateKey) - igodo nzuzo na-ebi na nchekwa anaghị ewepụ ma enweghị ike ibupu ya. Anyị na-eji aha mbinye aka gị họrọ X.509 asambodo ejiri aka ya rụọ. A na-akwado PDF ahụ na oghere efu / Sig n'ime ubi / AcroForm. Anyị na-agbakọ hash SHA-256 nke oke byte akwụkwọ ahụ ewezuga onye na-edobe ya. Eji igodo nkeonwe gị bịanye aka hash a site na crypto.subtle.sign (RSA-PKCS1-v1_5 ya na SHA-256). Anyị na-ewu ụlọ PKCS#7 / CMS SignedData nwere mbinye aka, asambodo gị, oge mbinye aka, yana ihe kpatara/ọnọdụ ọ bụla metadata. PKCS#7 blob bụ DER-kpọnyere ma tinye ya n'ime oghere PDF / Sig. Nbudata faịlụ ahụ. Onye ọ bụla na-ekiri PDF ọgbara ọhụrụ (Adobe, Chrome, Edge, Foxit, Preview, Firefox) na-agụ usoro PKCS#7 na oghe, na-atụgharị hash akwụkwọ ahụ, na-enyocha mbinye aka megide asambodo agbakwunyere, wee gosipụta baajị nkwenye. Ihe niile crypto na-agba na ihe nchọgharị gị - enweghị ihe nkesa, enweghị ebugo, enweghị telemetry.

Ajụjụ a na-ajụkarị

Kedu otu m ga-esi bịanye aka na PDF n'efu?

Dobe PDF gị na ibe dị n'elu. Onye nchịkọta akụkọ na-emepe na usoro Asambodo ahọpụtara nke ọma. See, pịnye, ma ọ bụ bulite mbinye aka gị. Pịa ibe ahụ ka idowe ya. Pịa Chekwa. N'efu, mpaghara, enweghị akara mmiri.

Kedu otu m ga-esi tinye mbinye aka na PDF?

Otu eruba - dobe, see, ebe, chekwaa. "Akara aka" na "tinye mbinye aka" na-arụpụta otu ihe ahụ na ngwá ọrụ anyị.

mbinye aka ndị a nwere n'ụzọ iwu kwadoro?

Ee n'ọtụtụ ikike. Mmepụta cryptographic anyị zutere EUeIDAS"Ere Akara Mbinye aka Eletrọnịkị" wee mejuo ihe USESIGN/UETAchọrọ. Maka akwụkwọ notaried ma ọ bụ ọrụ QES akọwapụtara ị ga-achọ asambodo TSP nyere na anyị enweghị ike iwepụta ihe nchọgharị - jiriAdobe Signma ọ bụ TSP obodo.

Ebugoro PDF m?

Mba. Ịbanye na-eme kpamkpam na ihe nchọgharị gị. PDF gị, mbinye aka na igodo nzuzo anaghị emetụ sava anyị aka.

Kedu ihe dị iche n'etiti mbinye aka electronic na dijitalụ?

Eletrọnịkị = akara ọ bụla a na-ahụ anya (ederede, aha akara, onyonyo). Dijitalụ = arụmọrụ cryptographic nke na-egosi njirimara + iguzosi ike n'ezi ihe. Anyị na-eme ha abụọ, kpokọtara na otu ngafe mbinye aka. Ọtụtụ ndị asọmpi n'efu na-eme naanị eletrọnịkị.

Kedu ihe bụ PKCS#7?

Ọkọlọtọ ngbanwe maka data bịanyere aka na PDFs. Onye ọ bụla na-ekiri PDF ọgbara ọhụrụ na-agụ PKCS#7 / CMS n'asụsụ ala. Ihe nrụpụta anyị dabara adaba - otu usoro Adobe Acrobat Pro na-eji.

PDF bịanyere aka na ya ga-arụ ọrụ na Adobe?

Ee. Adobe Acrobat Reader / Pro, Chrome, Edge, Firefox, Foxit, macOS Preview - niile na-enyocha mbinye aka anyị. Asambodo ejiri aka ya bịa na-egosi ịdọ aka na ntị "onye amaghi ama" (omume ziri ezi); bulite .p12 site na CA ntụkwasị obi maka nkwenye akara-acha ndụ ndụ.

Enwere m ike bulite asambodo m dị?

Ee. Na asambodo modal họrọ "Jiri akwụkwọ dị adị" wee bulite faịlụ .p12 ma ọ bụ .pfx gị (ya na paswọọdụ ma ọ bụrụ na ọ bụla). A na-enyocha asambodo ahụ na mpaghara - ebufebeghị ya.

Ọtụtụ mmadụ nwere ike ịbịanye aka n'otu PDF?

Ee, n'usoro. Banye na budata. Onye nnata mepere ya ebe a wee bịanye aka ọzọ. Akara ọ bụla mbinye aka na-ekpuchi ndị bu ụzọ - agbụ a na-ekwenye ekwenye.

Enwere m ike ịbanye PDF na ekwentị m?

Ee. Na-arụ ọrụ na iPhone Safari, iPad (karịsịa na Apple Pencil - ọ dị ka DocuSign Mobile), Chrome Android. Were mkpịsị aka gị see.

Enwere m ike ịbanye PDF paswọọdụ echedoro?

Ee ma ọ bụrụ na akpọchiri onye nwe ya, mba ma ọ bụrụ na akpọchiri onye ọrụ. Ọ bụrụ na akpọchiri onye nwe ya, ịbịanye aka na-arụ ọrụ ozugbo. Ọ bụrụ na onye ọrụ kpọchiri (paswọọdụ achọrọ imeghe), kpọghee site na/unlock-pdfmbụ. Ngwa abụọ a na-arụ na mpaghara.

Ọ na-arụ ọrụ na-anọghị n'ịntanetị?

Ee, ozugbo onye ndezi bujuru. Injin mbinye aka na-agba n'ime ihe nchọgharị gị.

Kedu maka mbinye aka akara oge (RFC 3161)?

Akwadobeghị aka - timestamps chọrọ oku netwọkụ na TSA mpụga nke na-emebi nkwa naanị mpaghara anyị. Maka usoro nkwado ogologo oge (LTV), jiri Adobe Acrobat Pro ma ọ bụ ọrụ mbinye aka azụmahịa.

Onye nyocha ga-ahụ asambodo ejiri aka m bịanyere aka na ya ka ọ dị irè?

Mba - ha ga-ahụ ịdọ aka ná ntị "onye nbinye aka amaghi ama" n'ihi na asambodo ejiri aka ya abanyeghị na mgbọrọgwụ CA ntụkwasị obi. mbinye aka n'onwe ya bara uru n'ụzọ cryptography - ọ bụ nkwupụta njirimara chọrọ ntụkwasị obi nke ndị ọzọ. Maka ojiji nkeonwe ọ zuru oke; maka iji iwu/ahịa, bulite .p12 site na CA tụkwasịrị obi.

Onye nnata ahụ nwere ike dezie PDF bịanyere aka na ya?

Mba - ọ bụrụ na ha dezie ya, mbinye aka cryptographic na-agbaji ma onye nyocha ọ bụla na-ahụ "mbinye aka adịghị mma, akwụkwọ emezigharịrị ka ọ bịanye aka na ya". Nke a bụ kpọmkwem ihe nchọta achọpụtara na-eme ka mbinye aka dijitalụ bụrụ ihe bara uru n'ụzọ iwu.

mbinye aka m ga-enwe akara mmiri?

Mba. PDF gị bịanyere aka n'akwụkwọ nwere kpọmkwem mbinye aka gị - ọ nweghị stampụ "Bịnyere aka na FreeTool", enweghị mgbasa ozi, enweghị iwe. Ihe ị bịanyere aka na ya bụ ihe ezigara.

Enwere oke nha faịlụ?

Enweghị oke arụrụ arụ. Ebe nchekwa ngwaọrụ bụ naanị uko ụlọ.

Nke a ọ bụ ihe nrịbama PDF kacha mma n'efu?

Ee - maka usoro ọrụ nzuzo nke mbụ yana maka ịnweta mbinye aka cryptographic na ọkwa efu, anyị chere otú ahụ. Maka orchestration na-arụ ọrụ ọtụtụ otu (ziga na ndị ntinye aka 5, ọnọdụ egwu),DocuSignma ọ bụAdobe Signbụ ngwa kwesịrị ekwesị - ụdị dị iche iche.

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