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Repair PDF Online Free – Fix Corrupted & Damaged PDF Files

Fix corrupted or damaged PDF files that won't open in any reader or printer. Upload your file to recover and restore a clean, working PDF. Free, no signup.

Select a PDF to repair

Drag & drop your damaged PDF file here

PDF files only · Up to 100 MB

How it works

Repair a PDF in 3 simple steps

No software to install. Works on any device with a modern browser - desktop, tablet or mobile.

01

Upload your damaged PDF

Click "Select PDF file" or drag and drop your broken PDF onto the page. SupaPDF accepts files up to 100 MB - even severely corrupted ones.

02

We rebuild the structure

Our engine reconstructs the cross-reference table, repairs malformed headers, recovers embedded resources, and re-assembles the page tree.

03

Download the repaired file

Click "Download PDF" and receive a clean, fully valid PDF in seconds. No manual steps, no software required.

Why SupaPDF

Everything you need to repair PDFs

Trusted by developers and businesses worldwide to recover corrupted documents reliably and at scale.

Deep structural repair

Fixes broken xref tables, malformed object streams, invalid page trees, and missing EOF markers - the most common causes of PDF corruption.

Private & secure

All uploads use encrypted HTTPS. Your files are permanently deleted from our servers immediately after your download is complete.

Maximum content recovery

Our repair engine extracts as much readable content as possible - text, images, and vector graphics - even from heavily damaged files.

Full developer API

Automate PDF repair in your own pipeline using our REST API. A single API call uploads, repairs, and returns a download URL.

Developer API

Repair PDFs programmatically

Use our REST API to repair corrupted PDFs inside your own application. Upload, repair, and download - all in one API call.

curl -X POST https://api.supapdf.com/v1/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "repair-pdf-job",
    "tasks": {
      "upload-1": {
        "operation": "import/upload"
      },
      "repair": {
        "operation": "repair_pdf",
        "input": ["upload-1"]
      },
      "export-result": {
        "operation": "export/url",
        "input": ["repair"]
      }
    }
  }'

After creating the job, PUT your file to the upload_url, then poll GET /v1/jobs/:id?include=tasks until status is "finished". The repaired file URL is in the export-result task.

FAQ

Frequently asked questions

Everything you need to know about repairing corrupted PDF files with SupaPDF.

Ready to fix your PDF?

Free to use · No account required · Instant download