Validate, format and minify JSON, explore it as a tree, see exact error locations.
Anslation CoreRuns in your browser — nothing to install
anslation.one/apps/anslation-json-lens
Anslation JSON Lens
Anslation JSON Lens on Web app — installable PWA — no store needed
Anslation JSON Lens
Anslation JSON Lens on Workspace — inside Anslation One
Anslation JSON Lens checks JSON as you type. It points to the line and column of any error and explains it in plain words: a trailing comma, a missing comma, single or curly quotes, an unquoted key, a comment, or an invisible character pasted from a web page. It formats with 2 spaces, 4 spaces or tabs, minifies, and can sort keys, keeping every number exactly as written. It warns about duplicate keys and about integers too large for JavaScript to store exactly. A collapsible tree view, usable with the keyboard, copies the path or value of any item. Ctrl or Cmd + Enter puts the result back in the input, with Undo. Open a .json file up to 5 MB and download the result. Your last document, up to 300,000 characters, stays in your browser.
Web App · For everyone · Developer Tools
Version 1.0.0
Oct 21, 2026
JSON Lens launched: live validation with line and column, pretty or minified output, sorted keys, warnings and a keyboard-friendly tree with copyable paths.
JSON Lens launched: live validation with line and column, pretty or minified output, sorted keys, warnings and a keyboard-friendly tree with copyable paths.
Oct 21, 2026
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Runs in your browser. What you enter stays on this device and is not used for tracking.
The creator declares no third-party tracking.
No data linked to your identity is declared.
This data may be collected but is not linked to your identity:
Privacy practices may vary, for example based on the features you use. Label checked Oct 21, 2026. Runs entirely in the browser; nothing you enter is uploaded.
Keep your last document in this browser so it is there next time.
Web app
installable PWA — no store needed
Workspace
inside Anslation One
Plan: Free
1 permission requested. The install review lists them before anything is installed.
90
/ 100
Eligible
Sample listing: these checks run on seed data. No certification review has taken place.
Quality score
Passed
Security review
Needs evidence
Privacy label
Passed
Support route
Passed
Release ready
Passed
No runtime check has reported for this app yet.
Signals the listing carries; the passport has the evidence behind each one.
The sandbox opens Anslation JSON Lens with sample records. Nothing you do there reaches your workspace.
Anslation community · Jun 21, 2026
Community wants a reusable onboarding recipe with sample data and install-safe defaults.
Anslation community · Jun 21, 2026
Share rollout notes, integration tips, and requests for the next release.
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