JSON Formatter
{ }Format, validate and tree-view JSON, with the exact line the error is on
From formatting JSON and generating Kubernetes manifests to CIDR maths, SSL certificate checks and cron expressions. 15 of 19 tools run entirely inside your browser — not one byte of your input reaches a server.
Search by capability, not just by tool name — typing HMAC, Ingress or VLSM finds the right one.
No tool matches that. Maybe it does not exist yet — request it on GitHub.
Format, validate and tree-view JSON, with the exact line the error is on
Check YAML syntax, browse it as a tree and convert it straight to JSON
Encode and decode text or files, with Data URI output and a URL-safe mode
Encode and decode URLs and parameters using URI, component or form rules
Pretty-print SQL with a dialect of your choice and consistent keyword casing
Convert timestamps to dates and back, with millisecond and Jalali support
Decode a token’s header and payload, and verify its signature with an HMAC or public key
Hash text or files, build an HMAC, and compare the result against a reference digest
Check expiry, issuer, SAN domains and the full certificate trust chain
Address range, broadcast, host count and the binary mask from CIDR notation
Split a network into named segments and get the complete range for each subnet
Live domain record lookups, with the full value and TTL of every record
See the status code, the redirect chain and every response header of a URL or API
Generate ready-to-apply Deployment, Service, Ingress, HPA and ConfigMap manifests from a form
Build a server block and catch common Nginx config mistakes before you reload
Validate docker-compose.yml and see every issue grouped by severity
Layer-by-layer image size straight from the registry, plus Dockerfile linting
Build and explain a cron expression, with a preview of the next few runs
Because half the time you spend on online tools goes to closing ads and worrying about what you just pasted.
Paste tokens, logs and private config without a second thought: 15 of 19 tools run entirely in the browser, and the rest are clearly labelled.
No account, no rate limit, no pop-ups. The page loads and the tool is ready.
You do not need the exact tool name. Hit Ctrl+K and search for the job instead — HMAC, broadcast or Ingress.
The whole codebase is on GitHub, and the interface was built for right-to-left and left-to-right from the start — not bolted on afterwards.
The things you would want answered before pasting a token into a site you do not know.
Ctrl + K (⌘ + K on a Mac) anywhere on the site to open the command palette. Type a tool name or just a capability — HMAC, Ingress, VLSM. Move with the arrow keys and open with Enter.