DollarWise

Free PDF Validator — Check PDF Files for Errors & Corruption

October 25, 2026 · 2 min read · By the DollarWise team

A PDF that “won’t open” rarely explains why. Upload it here and get a structured diagnosis: header and version, page count, encryption status, metadata, and corruption signals — with a clear pass, warning, or fail verdict for each check.

PDF Validator

Header, pages, encryption & corruption checks — one clear verdict.

100% Free Forever No Sign-up No Credit Card Private — files never leave your browser Unlimited Use

1 Upload a PDF to validate

📄 Drop a PDF here or click to browse

One file at a time · max 50 MB · files never leave your browser

2 Validation settings

Flag missing metadata as warning
Title/author metadata matters for archiving and search, not for opening the file.
Treat encryption as a failure
Off = encrypted files get a warning (they may still open with a password). On = they fail.
Full lists every check; summary shows only the verdict and failures.

3 Validate

🔍 Validation report

🎉 Free forever. No sign-up. No credit card. No limits.

Validate unlimited PDFs — your files never leave your browser.

How it works

Upload any PDF and hit Validate. The tool first inspects the raw bytes — checking the file is non-empty, starts with a %PDF- header, and ends with a %%EOF marker — then loads the document with pdf-lib to confirm the structure parses, count the pages, and detect encryption. Optional metadata checks flag a missing title or author, and strict mode adds page-size readability checks. Every check gets its own pass, warning, or fail line, plus one overall verdict.

Honest limits: this validates structure, not appearance — a PDF can pass here and still render oddly if its fonts or images are damaged, and page-content damage inside individual streams is not deeply scanned. Encrypted files are reported, not cracked: a password-protected PDF still needs its password in a real reader.

Everyday uses

  • Anyone with a “won’t open” PDF — find out in seconds whether it is truncated, encrypted, or not a PDF at all.
  • Offices — QA incoming files before archiving or forwarding them.
  • Students — check a downloaded paper is complete before submission day.
  • Support teams — ask a user to paste the verdict instead of guessing at the problem.
  • Archivists — flag files with missing metadata before filing them away.

Your files never leave your browser — validation runs locally with pdf-lib.