Free developer tools.
Fast, private, browser-only utilities from the team behind the jsonbolt desktop app. Everything runs locally in your tab — nothing you paste is ever uploaded.
JSON to YAML
Turn JSON into clean, correctly-quoted YAML — block scalars, safe quoting, instant. Convert →
YAML to JSON
Full YAML parser: anchors expand, comments drop, multi-document streams become arrays. Convert →
JSON to XML
Keys become elements, arrays repeat, @keys become attributes. Pretty-printed. Convert →
XML to JSON
Attributes, repeated elements, and CDATA handled predictably — values stay strings. Convert →
JSON to Excel
Preview the table, download a real .xlsx or .csv — Excel can't mangle your IDs. Convert →
JSON Escape / Unescape
Escape text for JSON strings, or decode escaped blobs from logs back to readable text. Transform →
JSON Minifier
Strip every insignificant byte, see the size saving live. Data byte-identical. Minify →
When the file is too big for a browser tab
Every tool on this page runs in tab memory — fine for payloads, painful for dumps. The jsonbolt desktop app parses JSON at 3 GB/s: press Win + J⌃ ⌥ J and whatever JSON is on your clipboard opens as an explorable tree, ready to search, extract, and export as YAML, CSV, or XML.
Free for personal use — no signup. YAML, CSV, and XML export are built in.