How to Crop a PDF Online Free in 2026: Margins, a Page or a Scan

To crop a PDF online free, open the file in PDF24, Sejda or PDFgear, drag the edges of the crop box or type a margin for each side, apply it to one page or all pages, and download. All three were free with no sign-up when we checked on 9 November 2026, and PDFgear crops inside your browser so the file never leaves your computer. This guide compares eight tools and explains why a crop hides content rather than removing it.

The job is always small and always urgent. A scanned contract has a grey border that prints as a black frame. A supplier's 40-page catalogue has one price table you want to drop into a quote. A US client sends a Letter-size brochure that chops the footer off on A4 paper. You search how to crop a PDF online, or crop PDF free, land on a tool, and hit a sign-in wall or a daily limit at the second file. Adobe's online crop tool asks you to sign in before it will crop, Xodo's free plan allows one action a day, and Sejda allows three tasks an hour, so which tool you pick matters more than the cropping itself.

Below: how we judged, the eight tools in one table with the limits read from each vendor's page today, step-by-step routes for margins, a single page and a scan, the Mac method and its trap, what cropping does and does not do to the data, and how to hand the whole chore (crop, compress, convert, rename) to an agent in one message.

How we judged

1. Limits read on the vendor's own page on 9 November 2026. Where a page gave no figure for files per day or file size, the table says "not stated" rather than repeating a number from a review site.
2. Where your file goes. A tool that crops inside the browser is safer for a contract or a payslip than one that uploads to a server, even one that deletes after an hour.
3. Sign-up and payment walls. A free crop that needs an account, a card for a trial or a daily cap is marked as such.
4. Per-edge control. Scans need a different margin on each side. Tools that only offer a free-hand drag are weaker for that job.
5. Honesty about what cropping does. Every tool here sets the page's visible area. None of them removes the hidden content unless it says so.

The crop PDF online tools at a glance

PDF24 is the default pick for a one-off: set each edge in millimetres, no account, files gone in an hour. PDFgear is the pick for anything confidential because nothing is uploaded. Sejda is the pick when you want a precise crop box applied to a page range and do not mind three tasks an hour.

Crop the margins off a scan

Scanners add a border, and cheap ones add a slanted grey band where the lid did not close. Cropping a few millimetres off each side fixes the print and makes the file look like a document rather than a photocopy.

1. Open the file in PDF24's crop tool and wait for the page previews. No account is needed.
2. Set the four edges separately. Scans are rarely centred, so the left margin often needs 8 mm while the right needs 3 mm. Type the values or drag the handles on the preview.
3. Apply to all pages if every page was scanned the same way. If page one was a cover scanned at a different angle, crop it on its own first and merge afterwards.
4. Download and check page 1 and the last page at 100% zoom. A crop that looks fine in a thumbnail can clip a footer or a signature line.
5. Compress if the scan is heavy. Scanned PDFs are images, so a 12-page scan can be 30 MB. Our compress guide covers the settings that keep text sharp.

A scan is one flat image per page, so no tool can "reflow" it after cropping. If the border is crooked, straighten it with a deskew or rotate step first, then crop. Sejda and PDF24 both rotate; PDFgear rotates in the browser.

Crop one page down to a table or a chart

The second common job is extracting a chart, a price table or a map from a long report so it can go into your own quote or slide. Cropping is the fast way, and it keeps the vector text crisp where a screenshot would blur.

1. Split out the page first so the crop applies to one page only. Our merge and split guide shows the free routes.
2. Drag a crop box around the table in Sejda or PDF24. Leave 2 or 3 mm of white space so the border lines are not cut.
3. Download, then insert the cropped PDF into Word, Google Docs or your slide deck as a file or image. Word accepts a PDF page as a picture through Insert and Pictures on recent versions.
4. Keep the source page number in your notes. A table lifted from page 31 of a supplier's catalogue will be queried later, and "page 31, 2026 edition" is the answer.

If the thing you want is a chart made of vector lines, cropping keeps it sharp at any zoom. If the report was itself a scan, you are cropping a picture and the result will only ever be as sharp as the scan.

Crop a Letter-size PDF to fit A4 paper

US Letter is 216 by 279 mm and A4 is 210 by 297 mm, so a Letter page printed on A4 is slightly too wide and leaves a gap at the bottom. Most printers scale to fit and the problem goes away. When they do not, trim 3 mm from the left and right edges with a per-edge crop, which leaves content alone because almost no document prints into its outer 3 mm. Do not try to crop the height: Letter is shorter than A4, so there is nothing to remove.

If the brochure has to look right rather than merely fit, the better route is to print it to a new PDF with the page size set to A4 and "fit to page" on. That rescales rather than crops.

Crop a PDF on a Mac with Preview, and the trap

Preview can crop without any upload. Apple's guide: open the PDF, show the Markup toolbar, choose Rectangular Selection, drag over the part you want to keep, then click Crop. You can undo with Edit and Undo Crop, or go back later through File, Revert To and Browse All Versions.

Apple's help page says cropping "removes everything outside your selection". Preview's own alert when you crop says the opposite: the content outside the selection is hidden in Preview, and you might be able to view it in other applications. The safe assumption is the second one. A Preview crop sets the visible area of the page and leaves the rest in the file. If the part you cropped away was a salary, an address or a signature, do not send that file to anyone. See the next section.

Cropping hides, it does not delete

A PDF page carries several rectangles. The media box is the full page as created. The crop box is the area a viewer or printer shows. Every online crop tool in the table above, and Preview, works by setting the crop box. The text, images and form fields outside it stay in the file, and anyone with a PDF editor can enlarge the crop box and see them again. That is why Acrobat's own community answers on "permanently cropping" point users to Redact and Sanitize Document, which removes deleted or cropped content, rather than to the crop tool.

What this means in practice:

• Cropping is right for layout. Margins, borders, fitting a page, pulling a chart for a slide: the hidden content does not matter and the file stays editable.
• Cropping is wrong for privacy. To remove a line, a column or a signature from a document you will share, use a redaction tool and then check the file with a text search. If the redaction worked, the text is not found.
• A flattened copy is a middle route. Printing the cropped PDF to a new PDF, or exporting it as an image and back, produces a file that only contains what you can see. It also loses the ability to select text, so use it for sharing, not for archiving.
• Scans are already flat. A cropped scan still contains the whole image unless you flatten it. The hidden part is a picture, not text, but it is still there.

Do the whole chore on Jobbit in one message

Crop is rarely the only step. The real task is "make this scanned contract look clean, under 2 MB, as one file, named properly". An agent takes that sentence and returns the file. Jobbit's free PDF compressor is a chat: you attach the PDF, pick a target size and the type of content, and the agent returns a compressed copy with the before-and-after sizes and a blur check. The same chat can merge, split or convert, and you can ask for a crop as part of the same instruction.

The free plan on Jobbit gives 100 credits a day with no card. The Go plan is £7 a month for 2,000 credits and hosting for one small app on your own domain, and the Plus plan at £15 a month is the one most small businesses pick. Your files are not published and you can delete the chat whenever you like.

How an AI agent helps

• Reads the document before cropping it. You say "crop to the price table on page 31" and it finds the table rather than asking for coordinates.
• Chains the steps. Crop, deskew, compress, convert to Word and rename in one go, instead of four tabs and four downloads.
• Checks the output. It opens the result, confirms no footer or signature was clipped and reports the final size.
• Handles the batch. Twenty scanned invoices with the same border get the same crop and come back as twenty clean files, or one merged file, as you prefer.
• Knows the difference between crop and redact. Ask it to remove a column and it will redact and verify rather than hide.
• Where it sits next to the chatbots. ChatGPT, Claude, Gemini, Microsoft Copilot, Manus and Meta's Muse can all explain how to crop a PDF, and several can edit one when a file is attached. A Jobbit agent does the editing with tools, hosts nothing you did not ask for, and can pass a job to a human from the network when a real designer is needed, for example to re-typeset a brochure that cropping cannot fix.

Read next

• Best Online PDF Tools in 2026: Compress, Merge, Split and Convert Compared on Price
• PDF Too Large to Email? 6 Free Fixes to Get Under the 25 MB Limit in Minutes
• How to Edit, Sign and Fill In a PDF Free in 2026

Frequently asked questions

How do I crop a PDF for free without signing up?

Use PDF24, Sejda or PDFgear. On 9 November 2026 all three cropped without an account. PDF24 and Sejda upload the file and delete it after one and two hours respectively, and Sejda allows three tasks an hour. PDFgear does the crop inside your browser, so nothing is uploaded at all.

Does cropping a PDF reduce the file size?

Usually not by much, because a crop only changes which part of the page is shown. The hidden content stays in the file. To make a PDF smaller, compress it after cropping, and for a scan expect the compression step to do nearly all the work.

Does cropping a PDF remove the hidden content?

No. Every mainstream crop tool sets the page's crop box and leaves the rest of the page in the file, where another PDF editor can reveal it. Preview's own alert says the content is hidden rather than deleted. To remove content for good, use a redaction tool or flatten the file by printing it to a new PDF.

Can I crop just one page of a PDF?

Yes. Sejda and PDF24 let you crop PDF pages selectively by choosing the pages a crop applies to, and Preview crops the page you are viewing. If a tool only offers "all pages", split the page out first, crop it, and merge it back.

How do I crop a PDF on Windows without Adobe Acrobat?

The free Adobe Reader has no crop command, so use one of the online tools in the table, or print the PDF to a new PDF with custom margins. PDFgear also offers a free Windows app that crops offline.

Can an AI agent crop a PDF for me?

Yes. On Jobbit you attach the file and describe the result you want, for example "crop the scan borders, keep it under 2 MB and send it back as one file". The agent does the crop, the compression and the renaming, checks that nothing important was clipped, and the free plan gives 100 credits a day with no card.