Open pdfedit.com/crop-pdf in any browser, drop your PDF onto the page. The crop modal opens automatically. Click Auto-detect content margins or set them with the four sliders. Click Apply, then Save. No account, no upload, no Adobe Pro.

How do I crop a PDF for free?

Use this tool — 100% free, no signup, no daily quota. Drop the PDF, set margins, apply, save. The crop runs in your browser using pdf-lib.

Yes. PDFs have a CropBox property that controls the visible region of each page — every PDF reader respects it. Cropping a PDF means setting that CropBox to a smaller rectangle. We do that in your browser without modifying the underlying content stream, so the original layout can be restored.

How do I crop a PDF on Mac?

Two options: (1) macOS Preview — File → Open the PDF → drag a selection rectangle around what you want to keep → Tools → Crop. Works offline, no install. (2) This tool — drop the PDF here, the crop modal opens, set margins or auto-detect, apply. Useful when Preview isn't available or when you need batch-style margin control.

How do I crop a PDF in Adobe?

In Adobe Acrobat Pro ($19.99/month): Edit PDF → Crop Pages → drag a rectangle on the page → set margins for all pages → OK. Adobe also offers Remove White Margins which auto-detects content. We do the same auto-detect, free, in your browser, no install.

Is this PDF crop tool free?

Yes. 100% free forever — no trial, no premium tier, no per-file charge, no daily quota.

No. The crop runs entirely in your browser via pdf-lib. Your PDF never leaves your device.

Will the cropped content be permanently deleted?

No — this is a soft crop (CropBox). The original page bounds are preserved in the file's MediaBox; the CropBox just defines the visible region. Reopening the PDF in any editor and resetting the CropBox restores the trimmed area. This is the same behaviour Adobe Acrobat's Crop tool produces.

Can I auto-detect content margins?

Yes — click Auto-detect content margins in the modal. We render page 1, scan for the bounding box of non-white pixels, and set margins to crop tight to the content with a small padding. Most documents have consistent margins across pages so page 1 is a reliable sample. Best for scanned documents, slides exported as PDF, and any doc with surrounding whitespace.

Can I crop one page or all pages?

Both. The modal has a scope selector — Apply to all pages (default) or Current page only. The current-page mode is useful for fixing odd one-off pages without altering the rest of the document.

Will the cropped PDF lose any quality?

No. Cropping doesn't re-encode any content — it just sets a smaller visible region. Text stays text, images stay images, vectors stay vectors at full fidelity. The output file size is essentially identical to the input.

What is a CropBox in a PDF?

PDFs have several boxes per page — MediaBox (full physical extent), CropBox (visible region in viewers), BleedBox (print bleed), TrimBox (final trim line), ArtBox (meaningful content). Setting the CropBox is what 'cropping' actually means in PDF terms. Adobe, Preview, and our tool all set CropBox.

Does it work on mobile?

Yes. iPhone Safari, iPad, Android Chrome — any modern mobile browser.

What's the best way to crop a PDF?

For privacy-first cropping with auto-detect and no upload, we believe pdfedit.com is the best free option. On Mac, Preview's built-in crop is a solid offline alternative. For desktop / batch automation, Adobe Acrobat Pro is the gold standard but costs $19.99/month.

Txiav PDF — Pub Dawb, Hauv Koj Qhov Browser, Tsis Muaj Upload

Trim margins, tshem cov chaw dawb, haum rau cov ntsiab lus. Auto-detect lossis teeb txhua leej. Saib ncaj qha. Tsis muaj Adobe Pro paywall.

Drop a PDF — the crop modal opens with a live preview. Click Auto-detect cov ntsiab lus margins to trim the surrounding whitespace automatically, or use the four sliders for manual top / right / bottom / left margins. Soft crop (CropBox) — same approach Adobe Acrobat uses. Original content is preserved; the crop can be reset later.

Tso koj PDF ntawm no

los yog

Tsis xav tau upload. Lub modal txiav qhib thaum koj PDF thauj khoom.

Yuav Txiav PDF Li Cas — Ib Kauj Ruam zuj zus

1
Tso koj PDF
Drag any PDF onto the dropzone above, or click Xaiv PDF to browse. The file loads into your browser memory only — no server upload.
2
Nyem Auto-detect cov ntsiab lus margins
Lub modal scans nplooh 1 rau lub thawv ntawm cov ntsiab lus uas tsis dawb thiab teeb margins kom txiav nyob ze rau cov ntsiab lus. Feem ntau cov ntaub ntawv muaj margins zoo li qub thoob plaws cov nplooh yog li nplooh 1 yog ib qho qauv ntseeg tau.
3
Lossis teeb margins txhua leej
Siv plaub tus sliders rau saum / sab xis / hauv qab / sab laug margins (txhua tus 0-50%). Saib ncaj qha qhia qhov chaw txiav nyob hauv liab kom koj pom raws nraim dab tsi tau txiav.
4
Xaiv scope: tag nrho cov nplooh lossis nplooh tam sim no
Default yog tag nrho cov nplooh. Hloov mus rau nplooh tam sim no nkaus xwb rau cov nplooh txawv ib zaug yam tsis hloov cov ntaub ntawv lwm.
5
Apply & save
Nyem Apply. PDF tau txiav rov thauj rau hauv qhov kho. Nyem Save los download. Qhov txiav yog ib qho soft CropBox — cov ntsiab lus thawj zaug tuaj yeem rov qab los ntawm rov teeb CropBox tom qab.

Vim li cas siv qhov PDF Crop Tool no?

Auto-detect cov ntsiab lus margins

Lub feature tua. Renders nplooh 1, scans rau cov pixels uas tsis dawb, teeb margins kom txiav nyob ze rau cov ntsiab lus nrog ib qho me me padding. Zoo nkauj rau cov ntaub ntawv scan, slide decks, thiab txhua yam uas muaj chaw dawb nyob ib puag ncig.

100% hauv zos

Koj PDF tsis tawm hauv koj lub cuab yeej. Adobe (web), iLovePDF, Sejda, Smallpdf, PDF24 tag nrho upload — peb tsis tau.

Soft crop, rov qab tau

Peb teeb CropBox ntawm nplooh, tsis yog MediaBox. Cov ntsiab lus thawj zaug tseem khaws cia; qhov txiav tsuas yog narrows qhov pom xwb. Tib txoj kev Adobe Acrobat siv rau Edit → Crop. Rov teeb CropBox rov qab nplooh thawj zaug.

Saib ncaj qha

Txhua qhov hloov margin tam sim ntawd hloov kho qhov pom dua nrog liab overlay nyob saum thaj chaw txiav. Tsis muaj kev twv.

Tsis poob qhov zoo

Txiav tsis re-encode dab tsi. Ntawv, duab, vectors tag nrho khaws cia tag nrho. Cov ntaub ntawv tawm tuaj loj ≈ cov nkag.

Pub dawb, tsis muaj kev sau npe, tsis muaj kev txwv

Tsis muaj account, tsis muaj email, tsis muaj captcha, tsis muaj kev them ib hnub, tsis muaj watermark.

Crop PDF vs Adobe Acrobat, iLovePDF, Sejda, macOS Preview

Feature	PDF Edit	Adobe Acrobat Pro	iLovePDF	Sejda	macOS Preview
PDF tau xa mus rau lub server?	Tsis yog — 100% hauv zos	Yog (web) / Tsis yog (desktop)	Yog	Yog	Tsis yog
Tus nqi	Pub dawb	$19.99/month	Pub dawb + them	Pub dawb + them	Pub dawb (Mac nkaus xwb)
Auto-detect cov ntsiab lus margins?	Yog	Yog (Tshem White Margins)	Tsis yog	Txwv	Tsis yog
Saib ncaj qha?	Yog	Yog	Txwv	Yog	Yog
Ib nplooh los yog tag nrho cov nplooh?	Ob qho	Ob qho	Tag nrho xwb	Ob qho	Ib nplooh
Cross-platform?	Txhua qhov browser	Win / Mac / web	Web	Web	Mac nkaus xwb
Ua haujlwm offline tom qab thauj khoom?	Yog	Desktop yog / web tsis yog	Tsis yog	Tsis yog	Yog

macOS Preview yog qhov kev xaiv tsim ua ntej zoo tshaj plaws rau cov neeg siv Mac. Rau lwm tus (Windows, Linux, Chromebook, mobile), lossis rau qhov auto-detect feature ntawm Mac, qhov cuab yeej no them dab tsi Preview tsis tau.

Cov Lus Nug Nquag Nug

Kuv yuav txiav PDF li cas?

Tso PDF rau ntawm nplooh saum toj. Lub modal txiav qhib. Nyem Auto-detect lossis teeb margins txhua leej. Nyem Apply, ces Save.

Kuv yuav txiav PDF pub dawb li cas?

Siv qhov cuab yeej no — 100% pub dawb, tsis muaj kev sau npe, tsis muaj kev them ib hnub.

Koj puas tuaj yeem txiav PDF?

Yog — txhua PDF muaj ib qho CropBox khoom uas txhais qhov pom. Txiav PDF txhais tau tias teeb CropBox me dua. Peb ua qhov ntawd hauv koj qhov browser.

Kuv yuav txiav PDF rau Mac li cas?

Ob qho kev xaiv: macOS Preview (rub ib qho xaiv plaub fab, Tools → Crop), lossis qhov cuab yeej no (ntau yam, auto-detect, cross-platform).

Kuv yuav txiav PDF rau Adobe li cas?

Adobe Acrobat Pro: Edit PDF → Crop Pages → rub ib qho plaub fab → teeb margins → OK. $19.99/month subscription. Peb tus ua tib yam auto-detect feature, pub dawb.

Cov ntsiab lus tau txiav puas yuav raug tshem tawm mus tas li?

Tsis yog — soft crop. Peb teeb CropBox, tsis yog MediaBox. Cov nplooh thawj zaug tseem khaws cia thiab muaj peev xwm rov qab.

Kuv puas tuaj yeem auto-detect cov ntsiab lus margins?

Yog. Nyem Auto-detect cov ntsiab lus margins. Peb scan nplooh 1 rau cov pixels uas tsis dawb thiab teeb margins kom txiav nyob ze rau cov ntsiab lus.

PDF tau txiav puas yuav poob qhov zoo?

Tsis yog. Txiav tsis re-encode dab tsi — ntawv, duab, vectors tag nrho khaws cia tag nrho.

CropBox yog dab tsi?

PDF nplooh khoom uas tswj qhov pom hauv viewers. Teeb me dua yog dab tsi txiav PDF txhais tau tiag tiag.

Kuv PDF puas tau xa mus?

Tsis yog. Txiav khiav tag nrho hauv koj qhov browser dhau ntawm pdf-lib.

Puas muaj kev txwv loj ntawm cov ntaub ntawv?

Tsis muaj kev txwv tau tsim.

Puas ua haujlwm rau hauv mobile?

Yog — iPhone Safari, iPad, Android Chrome.

Puas ua haujlwm offline?

Yog thaum nplooh tau thauj khoom tau.

Hais txog cov cuab yeej no: Lub cav txiav ntawm no yog tib lub cuab yeej txiav uas peb cov tshuab kho ntawv tseem ceeb xa tuaj — tso koj PDF, qhov kho qhib nrog cov modal txiav ua ntej. Ib qho chaw uas tseeb, tsis muaj cov code txiav rov qab. PDF tsis tawm hauv koj lub cuab yeej — pdf-lib teeb CropBox tag nrho hauv koj qhov browser.