Diff two PDFs side by side — spot changed clauses, figures, and pages before signing. Review a 20-page contract revision in minutes — local PDF.js comparison, free, no signup.
Runs on PDF.js
Content reviewed October 2026 · About Toolzum
Extract PDF content into editable DOCX files. Preserves formatting, tables, and layout — review complex layouts after conversion.
Trims PDF file size by stripping redundant metadata and optimizing object streams — best on text-heavy documents. Cannot recompress embedded images (the main size driver); for scan-heavy PDFs use Bulk PDF Size Reducer. Handles PDFs up to 125MB.
Convert PowerPoint decks to locked PDFs for sharing — fonts embedded, layout frozen. Send a 40-slide pitch that renders identically everywhere — local conversion, unlimited saves.
Diff two JSON documents with path-level change listing — spot breaking API changes instantly. Review a 500-line response diff in minutes — local processing, free, no signup.
Compares two input texts side-by-side, highlighting inserted, deleted, and changed lines with distinct background colors. Code never leaves your device — formatting and validation run locally in your browser.
Upload original and revised: differing paragraphs highlight with page numbers. A 20-page vendor revision reviews in minutes instead of a read-through afternoon.
Text diff catches wording and figure changes precisely; scanned image-only PDFs compare poorly until OCRed. Run text comparison first, eyeball flagged pages second.
Review happens on-screen; screenshot or note flagged pages for counsel. The tool itself saves nothing — comparison is view-only by design.
No — comparison runs locally in your browser with PDF.js. Documents never leave your device and nothing is stored.
PDF Info & Analysis
Read any PDF's metadata instantly — page count, size, author, creation date, encryption status. Verify a download before opening fully — local parsing, free, no signup.
PDF OCR (Scanned Docs)
OCR scanned PDFs into extractable text with Tesseract.js — English, Hindi, Spanish, or French. Convert a 50-page scan into researchable text — local processing, unlimited saves.