For Developers & Engineers
Paste two JSON responses, YAML configs, or any structured text and see exactly what's different. Structure-aware — whitespace and key ordering ignored. JSON and text files are always free.
See it in action
Use cases
Compare two OpenAPI or Swagger specs and see exactly which endpoints, parameters, and response schemas changed between versions.
Compare .env files, YAML configs, TOML, or any config format. Upload the files or paste the text directly — no install required.
Compare test output, log files, or SQL query results to find regressions. Upload any plain-text file for a line-by-line diff.
Privacy
Source code, API keys, and config files are sensitive. We have no technical ability to see your content — all comparison happens locally in JavaScript inside your browser. There is no server, no upload, no storage.
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.
Why no AI
Compare Files uses a deterministic, logic-based engine — not a language model. It reads both files and reports every change that is actually there. It can’t summarize away a deleted line, invent a difference that isn’t in the file, or “mostly” get a number right. What you see is exactly what changed — nothing added, nothing missed. For configs and code, that means no AI reformatting your diff or ‘fixing’ a value you meant to change.
Your files never leave your device. Everything runs in your browser — no uploads, nothing stored.
No AI, so no hallucinations. A deterministic engine reports every real change and never invents one.
No upload, no server wait. Comparisons run locally and keep working offline once the page has loaded.
FAQ
Yes — JSON and YAML comparison is completely free, with no account or payment required. Paste two JSON objects or YAML configs directly into the tool and get a structured diff immediately, including nested key changes and value differences across any depth.
It parses JSON and YAML structurally, so it catches a changed value even when whitespace or key ordering differs between the two versions. This eliminates the false positives you get from raw text diff when the content is semantically identical but formatted differently.
Yes — paste JSON, YAML, XML, SQL, or any plain text directly into the editor without touching a file. This is useful for quickly diffing API responses, config snippets, or query output without any file handling overhead.
JSON, YAML, XML, SQL, and plain text files are all supported — upload files or paste content directly. JSON and YAML comparison is free; plain text files are free. PDF and DOCX documents require Pro — €9.99/mo.
The browser-based interface renders structured diffs for JSON and YAML with clear visual highlighting rather than raw patch output, works on any OS without setup, and makes it easy to share a comparison with a colleague who does not have terminal access. It is the fastest path for ad-hoc checks during code review or incident investigation.
All tools
Image comparison unlocks with Pro — €9.99/mo. JSON, YAML, text, and config files are always free.
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