PDFSlim
Free PDF Repair Tool

Repair Corrupted PDF
For broken files you still need to open.

Rebuild damaged or unreadable PDFs in the browser when a download failed, a transfer broke the file, or a document opens inconsistently. Keeping the repair step local helps when the PDF still contains private records you need to inspect carefully.

No Uploads Browser Only Local Processing

Drop Corrupted PDF Here to Repair

Supported: PDF

What this tool can fix

Broken XRef table

The most common cause of unreadable PDFs — rebuilt on every repair.

Embedded JavaScript

Strip potentially malicious JS actions from the document.

Annotations & comments

Remove all markup, sticky notes, and highlights.

Sensitive metadata

Strip author, title, and creation date from the file.

Browser-Based Privacy

Repair PDF workflow notes

Broken PDFs interrupt work at the worst times. Sometimes the issue is file corruption, sometimes it is a partial download, and sometimes it is a compatibility problem that only shows up in one app. A repair workflow helps you work through those possibilities methodically instead of guessing.

Best use cases

  • Recover a file that will not open properly in your usual PDF reader.
  • Stabilize a document before you try to print, merge, or extract content from it.
  • Assess whether a damaged PDF is still usable enough for part of a workflow.

Before you share

  • Keep the original file for comparison and fallback.
  • Check opening behavior, page count, and visible content after repair.
  • Ask for a fresh copy if the repaired result is still incomplete.

Practical limits

  • Repair PDF works on the file you provide, but it cannot correct source problems such as missing fonts, broken scans, or incomplete document structure on its own.
  • Performance depends on the memory and CPU available in the current browser tab, so very large files or image-heavy PDFs can still take longer to finish.
  • The browser-based workflow keeps files private and fast to process, but you should still inspect the final PDF before sending it to a client, portal, or records team.

Every tool runs in your browser, so there is no upload queue slowing the job down.

That is useful for private work and for large files on limited bandwidth.

Read the guideBrowse PDF guides
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Knowledge Hub

Master Document Security & Workflows

Read practical guides that explain when to use each tool, what to check before sharing a file, and how to avoid common document mistakes.

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Actionable Technical Guides
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