Compare two JSON objects side by side with visual diff highlighting. See additions, deletions, and changes instantly. Export diff reports in JSON, CSV, or TXT formats.
- Side-by-side or unified diff view with color highlighting
- Ignores key order so structural changes stand out
- Export diff results to JSON, CSV, or plain text
- History and saved diffs for repeat comparisons
- Paste or load from file; no data leaves your browser
Compare API versions, configs, or database dumps without command-line tools. Visual highlighting shows exactly what changed, and export lets you share or document differences.
Spoold is a free developer toolbox that detects what you paste and opens the right tool.
- No sign-up – Use every tool without an account.
- Runs in your browser – Your data stays on your device; we don’t store or log your input.
- Paste and go – Paste JSON, HTML, JWT, curl, Base64, or any text on the homepage and Spoold suggests the right tool.
- One place for many tools – JSON formatter, JWT decoder, Base64, UUID generator, regex tester, curl-to-code, and more.