100% private · in-browser · one-time $9

Compare any files — privately, instantly.

Text, spreadsheets, images, PDFs, DOCX, and JSON. All processing happens in your browser. Your files never touch a server.

Start with text — free Unlock all formats — $9 →

All comparators

Every file format, one tool.

Text comparison is always free. Everything else — images, spreadsheets, documents, JSON — is unlocked with a single $9 payment. Lifetime access, no subscription.

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TextFree

Line-by-line comparison with LCS diff. Paste any text, code, or config.

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ImagesPRO

Pixel-perfect visual comparison. Set a tolerance threshold — ignore anti-aliasing noise.

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SpreadsheetsPRO

CSV and Excel diff with row matching. Match by key column or position.

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DocumentsPRO

PDF and DOCX compared side by side. Extracted client-side — nothing uploaded.

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JSON / YAMLPRO

Structure-aware comparison. Whitespace-normalized so format differences are ignored.

See it in action

Instant, clear diffs.

Every change highlighted. Added lines in green, removed in red. Export results to CSV. Works on files of any size — all in your browser.

Try text diff for free →

Diff2 added · 1 removed

1 Employee ID, Name, Department, Salary

2−E001, Alice Johnson, Engineering, 95000

3+E001, Alice Johnson, Engineering, 102000

4 E002, Bob Smith, Marketing, 78000

5−E003, Carol White, Sales, 71000

6+E004, David Lee, Engineering, 98000

Your files never leave your device. Ever.

Compare Files works entirely in your browser. There is no server that receives, processes, or stores your file data. Not because we promise not to look — but because we architecturally cannot. All comparison logic runs locally in JavaScript.

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