Free developer tools, in your browser
Fast utilities with no signup and no upload — everything runs locally in your browser.
OpenTelemetry Validator
Paste an ExportTraceServiceRequest payload and get structural validation with per-field findings — entirely in your browser, nothing is uploaded.
Status Page Generator
Define your components and their statuses, preview the page live, and copy a self-contained static HTML file you can host anywhere — all in your browser.
Log Formatter
Paste raw log output and get embedded JSON pretty-printed, lines color-coded by level, error/warning filters, and per-level counts — without uploading a single line.
JWT Decoder
Paste a JWT and see its header and payload decoded instantly, with exp and iat as human-readable dates and a clear expired/valid badge — decoded locally, never uploaded.
HTTP Header Inspector
Paste the output of curl -I and get every header parsed into a table, plus an analysis of your security headers — HSTS, CSP, X-Content-Type-Options, frame protection, Referrer-Policy, and Permissions-Policy — with a score.
Cron Parser
Type a 5-field cron expression and get a plain-language explanation plus the next 5 run times in your local timezone — parsed instantly in your browser.
curl Generator
Pick a method, set the URL, add headers, auth, and a body — and copy a curl command with shell escaping handled correctly, built entirely in your browser.
JSON Formatter
Paste JSON to pretty-print or minify it, with parse errors pinpointed by line and column — processed entirely in your browser, nothing uploaded.