DocxLens
DocxLens is a web-based comparison tool for contracts, spreadsheets, configuration files, PDFs, text, and code.
What DocxLens is
DocxLens is a web-based comparison tool for contracts, spreadsheets, configuration files, PDFs, text, and code. It supports 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 with Tesseract OCR. Excel and CSV comparisons work sheet by sheet and include 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. Documents appear in synchronized side-by-side columns with scroll lock. DocxLens uses the Myers algorithm for line differences and word-level comparison for inline changes, and exports plain-text summaries with line numbers and change types. Files are processed in the browser with WebAssembly and, according to the site, are never uploaded. After initialization, PDF, Word, and Excel extraction can work offline. The free plan costs nothing, needs no signup, supports five documents at once, and allows 20MB per file.
Good
- Supports office, PDF, text, JSON, and code files
- OCR for scanned PDFs
- Sheet-level spreadsheet comparison
- Synchronized side-by-side view
- Browser-local processing with no uploads
Watch out
- 20MB maximum per file
- Five-document comparison limit
- Requires page and processor initialization for offline extraction
Who it suits
DocxLens suits lawyers, paralegals, finance and accounting teams, developers, and HR or operations staff comparing varied file types. It is useful when browser-local processing and offline extraction are important.
Verdict
DocxLens covers document, spreadsheet, PDF, and code comparisons in one browser tool, with OCR and structured difference views. Its free plan is constrained by file size and simultaneous-document limits.
Plans and prices
From DocxLens's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | No signup · Up to 5 documents at once · 20MB per file · No hidden limits |
The facts
Each one read from DocxLens's own pages, with the date it was checked.
What it does
- 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.checked 8 Oct 2026
- Diff algorithm
- DocxLens uses the Myers algorithm for line-level differences and word-level diff for inline changes.checked 8 Oct 2026
- Export
- Users can download a plain-text diff summary with line numbers and change types.checked 8 Oct 2026
- Intended users
- The site describes workflows for lawyers and paralegals, finance and accounting teams, developers, and HR and operations teams.checked 8 Oct 2026
- Limits
- Each file can be up to 20MB, and up to five documents can be compared at once.checked 8 Oct 2026
- Offline use
- After the page loads and processors initialize, PDF, Word, and Excel extraction can work offline.checked 8 Oct 2026
- Privacy
- Files are processed in the browser using WebAssembly, and the site says files are never uploaded to a server.checked 8 Oct 2026
- Purpose
- DocxLens compares documents side by side, including contracts, spreadsheets, and config files.checked 8 Oct 2026
- Scanned PDFs
- Tesseract OCR extracts text from scanned or image-based PDFs when no text layer is detected.checked 8 Oct 2026
- Side-by-side view
- Documents appear in synchronized columns with scroll lock.checked 8 Oct 2026
- Spreadsheet comparison
- Excel and CSV files are compared sheet by sheet, including cell values, formula results, and data columns.checked 8 Oct 2026
- Supported formats
- It supports PDF, DOCX, DOC, XLSX, XLS, CSV, JSON, TXT, MD, and 15+ code file types.checked 8 Oct 2026
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