Compare anything
Drop any two files — FileDuel figures out the format and shows you exactly what changed.
Text & Code
Plain text, source code, configs, logs, markdown — any text-based file.
Excel
Cell-by-cell comparison across sheets. Formula diff, row changes, value tracking.
PDF
Text extraction and visual side-by-side diff across pages.
Word / DOCX
Paragraph-level comparison of Word documents.
Images & OCR
Photograph documents and compare extracted text using on-device OCR.
EDI & CSV
Structured data formats, delimited files, and EDI transaction sets.
Powerful diff, zero friction
Built around a Myers O(ND) algorithm with Hunt-McIlroy LCS for large files — the same diff engine used by Git.
01
Split & unified views
Toggle between side-by-side split view and unified inline diff depending on your preference.
02
Smart diff options
Ignore whitespace, case, blank lines, or apply custom regex patterns to filter out noise.
03
Excel sheet mapping
Choose which sheets to compare, set a key column for row-level matching, detect formula changes.
04
Export results
Share your diff as HTML, JSON, CSV, or a patch file directly from the app.
05
Change navigation
Jump between changes with the built-in navigator. See a summary of additions, deletions, and edits.
06
Landscape mode
Full landscape support on all screens — more diff content, less chrome.
Privacy by design
Your files never leave your phone
FileDuel processes everything locally. There is no server, no upload, no account. What you compare stays on your device — always.
Zero data collection
We collect no personal data, no file contents, no usage analytics tied to you.
On-device OCR
Image text extraction uses Google ML Kit locally. Photos are never uploaded to any server.
No account needed
Open the app, pick two files, compare. No sign-up, no login, no email required.
Subscription only via stores
Pro upgrades go through Google Play or the App Store. We never see your payment details.
FileDuel Pro
Unlock the full toolkit
The free version covers text and code comparison. Pro unlocks Excel, PDF, large files, and export.
- Excel diff — sheet mapping, formula changes, key-column matching
- PDF diff — text extraction and visual comparison
- Files over 500 KB
- Export as HTML, JSON, CSV, or patch