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DocxLens
What it is
DocxLens is a web tool for comparing documents in synchronized side-by-side columns with scroll lock. It handles PDF, DOCX, DOC, XLSX, XLS, CSV, JSON, TXT, MD, and more than 15 code file types. Scanned or image-based PDFs without a text layer can be read through Tesseract OCR. Excel and CSV files are compared sheet by sheet, including cell values, formula results, and data columns. Code and JSON comparisons use syntax-aware line differences with word-level highlights for languages including JavaScript, TypeScript, Python, Go, Java, and PHP. The service uses the Myers algorithm for line-level changes and word-level comparison for inline edits. Users can download a plain-text summary with line numbers and change types. Files are processed in the browser with WebAssembly, and the site says they are never uploaded to a server. After processors initialize, PDF, Word, and Excel extraction can work offline. The free plan costs nothing, requires no signup, allows five documents at once, and limits each file to 20MB.
For and against
For
- Supports office, PDF, text, and code files
- OCR handles scanned PDFs without text layers
- Spreadsheet comparisons include formulas and data columns
- Browser processing keeps files off the server
- No-signup free plan
Against
- 20MB maximum per file
- Five-document comparison limit
- Offline extraction requires processor initialization
The verdict
DocxLens offers broad file support and detailed side-by-side diffs at no cost. Its browser-based processing and offline extraction are useful, but file size and simultaneous-document limits shape larger reviews.
Who it suits
DocxLens suits lawyers, paralegals, finance and accounting teams, developers, and HR or operations staff comparing document changes. It is useful when browser processing, offline extraction, or multiple file formats matter.
Plans and prices
Free
No signup · Up to 5 documents at once · 20MB per file · No hidden limits
Read 8 Oct 2026 · docxlens.com
On the record
- Code and JSON
- Code and JSON comparison uses syntax-aware line diffs with word-level highlights and supports languages including JS, TS, Python, Go, Java, and PHP.docxlens.com · read 8 Oct 2026
- Diff algorithm
- DocxLens uses the Myers algorithm for line-level differences and word-level diff for inline changes.docxlens.com · read 8 Oct 2026
- Export
- Users can download a plain-text diff summary with line numbers and change types.docxlens.com · read 8 Oct 2026
- Intended users
- The site describes workflows for lawyers and paralegals, finance and accounting teams, developers, and HR and operations teams.docxlens.com · read 8 Oct 2026
- Limits
- Each file can be up to 20MB, and up to five documents can be compared at once.docxlens.com · read 8 Oct 2026
- Offline use
- After the page loads and processors initialize, PDF, Word, and Excel extraction can work offline.docxlens.com · read 8 Oct 2026
- Privacy
- Files are processed in the browser using WebAssembly, and the site says files are never uploaded to a server.docxlens.com · read 8 Oct 2026
- Purpose
- DocxLens compares documents side by side, including contracts, spreadsheets, and config files.docxlens.com · read 8 Oct 2026
- Scanned PDFs
- Tesseract OCR extracts text from scanned or image-based PDFs when no text layer is detected.docxlens.com · read 8 Oct 2026
- Side-by-side view
- Documents appear in synchronized columns with scroll lock.docxlens.com · read 8 Oct 2026
- Spreadsheet comparison
- Excel and CSV files are compared sheet by sheet, including cell values, formula results, and data columns.docxlens.com · read 8 Oct 2026
- Supported formats
- It supports PDF, DOCX, DOC, XLSX, XLS, CSV, JSON, TXT, MD, and 15+ code file types.docxlens.com · read 8 Oct 2026
