500+ free, private calculators & converters that run entirely in your browser.
A complete, privacy-first suite of JSON utilities — parse, read, view, edit, format, minify, convert and validate. Every tool runs entirely in your browser; nothing is ever uploaded.
Paste JSON to parse and validate it. Valid input is pretty-printed; invalid input shows exactly what went wrong.
Drop in minified or messy JSON and read it as clean, indented text.
Paste JSON to explore it as a collapsible tree. Click any node to expand or collapse it; use Expand/Collapse all to navigate large documents.
Edit JSON directly, then Format or Minify it. The status line validates as you type so you catch mistakes immediately.
Turn JSON into an expandable tree so you can see its structure and hierarchy at a glance.
Paste formatted JSON and get a compact, single-line version with all unnecessary whitespace removed.
Turn JSON into an escaped, quoted string literal — ready to paste into source code as a single string.
Convert JSON into a single escaped string you can drop into code, a log line or a string field.
Escape any text so it can sit safely inside a JSON string — quotes, backslashes, tabs and newlines are all handled.
Paste an escaped JSON string to turn it back into plain, readable text.
Percent-encode JSON so it's safe to put in a URL, query parameter or form value.
Decode percent-encoded JSON from a URL or query string back into readable JSON.
Paste JSON5 — with comments, trailing commas, single quotes and unquoted keys — and get clean, standard JSON back.
Paste JSON5 to check whether it's valid. Errors point you straight at the problem.
Need to convert between formats? Try the JSON ↔ YAML / XML / CSV converters or the all-in-one Data Converter in the workspace. For formatting and validating in one place, the JSON Formatter handles beautify, minify and validate together.