JSON Formatter, Validator & Tree View
Pretty-print, minify, validate, and explore JSON with a collapsible tree view.
Paste JSON to pretty-print it, minify it, validate it (with line and column on errors), and explore it as a collapsible tree.
Runs entirely in your browser — nothing you enter is sent to a server.
Need this for real, on your stack?
These free tools are a taste of how we think. We’re a senior software team across Romania & Pakistan that ships deep technical work — platforms, infra, data and the gnarly bits in between.
Talk to our engineers →Strict parsing
This uses the browser's native JSON parser — strict spec-compliant. Trailing commas, single quotes and comments are rejected (as they should be).
Sizes that matter
We also surface byte size, depth and key count. If your payload is hundreds of kB, that's usually a wire-format problem worth addressing.
Built by WeWorkWorldwide — a senior software team in Romania & Pakistan that ships deep technical work. Need this turned into something production-grade for your stack? Talk to our engineers →