Pdf ClarityBrowser-first PDF tools
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Compare PDFs

Compare two PDFs — see what changed, side by side.

Upload two PDFs and get a clean diff report of text, structure, and metadata differences — free, in your browser, with no signup.

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Upload your file to start

Supported formats: Two PDF inputs compared side by side, text and structure diff report.

Browser-local processingFiles stay on this deviceNo account wallTrust details

What happens next

Your file opens in the matching tool so you can edit, convert, or export it without uploading it a second time.

  • No signup
  • No watermarks
  • Files deleted after 1 hour
ISO/IEC 27001 (in progress)
GDPR compliant
TLS 1.3
Files deleted after 1 hour
No signup required

How to compare two PDFs in 3 steps

Your first PDF lands in the compare workspace as Document A, the second uploads inside the workspace as Document B, and the browser runs the diff as soon as both are staged.

  1. Upload the first PDF

    Drag your earlier PDF into the dropzone above, or click to browse. Your file opens in the compare workspace as Document A without leaving the browser.

  2. Upload the second PDF

    Drop your newer PDF into the Document B slot inside the workspace. Pdf Clarity keeps both files local while it lines them up for compare.

  3. Review the differences

    Step through changed, unchanged, and one-sided pages in the compare report. You can download a plain-text or JSON diff summary when you are done.

Everything you need to compare PDFs

Your compare toolkit surfaces the diffs that matter — text, metadata, page structure — and keeps the visible output honest when coverage is limited. You never pay extra, and your PDFs never leave your session.

  • Side-by-side page view

    Walk through both PDFs one aligned page at a time, with changed areas called out against the unchanged ones. You spot the moved signature or swapped paragraph without scrolling two tabs.

  • Text, metadata, and structure diff

    The report calls out text changes on pages with selectable text, plus metadata and page-structure differences across the two PDFs. You get one view instead of three tools.

  • Downloadable diff report

    Export a plain-text or JSON summary of every detected difference for review or archive. You keep a record of what changed between the two PDFs.

  • No watermark, no signup

    Your compare runs in the browser with no watermark added to either file, no account needed, and no hidden charge on the diff output. You keep both original PDFs untouched.

Why people choose pdfclarity

  • Private by default

    Your PDFs are transferred over TLS and deleted within one hour. We don't look at them, and you don't need an account.

  • Fast and free

    Editing, annotating, signing, merging and splitting are free with no signup. Your first upload opens the editor in seconds.

  • Works in any browser

    Open the editor in Chrome, Safari, Firefox or Edge on Mac, Windows, Linux or Chromebook. You never install anything.

More ways to compare PDFs

Compare two PDFs

Line up two PDFs and walk through the differences page by page. You stop having to flip between windows or open a diff desktop app when a teammate sends a revised file.

Find differences in PDFs

Surface text, metadata, and structural differences without deep-diving every page yourself. You get a changed-versus-unchanged summary before you open individual pages.

Version diff for PDFs

Compare the v1 and v2 of the same PDF when you need to know exactly what the latest round of edits changed. Your diff report lists every page where the two versions diverge.

Contract redline check

Compare a signed contract against a clean version to confirm nothing else was altered. You keep a record of the differences in case you need to come back to them later.

Frequently asked questions

Quick answers to what people ask us most about editing a PDF online for free. Tap any question and the answer expands inline.

Does it show text changes only, or layout too?
Both. The compare report surfaces text differences on pages with selectable text, plus metadata and page-structure differences across the two PDFs — you don't pick between one or the other.
Is this free?
Yes. Comparing two PDFs in the browser is free with no signup, no watermarks, and no fees tied to the diff report or its download.
Can I compare two versions of a contract?
Yes. Upload the earlier version as Document A and the newer version as Document B. Your report lists text, metadata, and structural differences side by side so you can confirm the change set.
Will my compared PDFs get a watermark?
Never. Pdf Clarity does not add watermarks to either PDF during a compare run, ever.
Are my files safe?
Your PDFs are transferred over TLS and deleted within one hour of upload. We don't look at them, and you don't need an account to run the compare.
Is there a file size limit?
Files up to 100MB each are supported on the free plan, which covers the PDFs most compare runs need for document-level review.

Related PDF tools

Learn more

Ready to keep reading? You can go deeper on common tasks in the help center articles below.

You can also browse all PDF tools from the tools hub.