LightJSON
All tools

JSON, made readable.

Format, check and explore your data. Everything stays in your browser.

Processed locally

JSON code

Format adjusts indentation; Minify removes extra whitespace. Copy and download use the current code.

Loading editor…
0 B / 0 linesCtrl / ⌘ + Enter to format

Tree

Two-way sync

Edit a field or value to update the code. Code edits update this tree.

Paste JSON or load an example to see its structure.

Tree edits can be undone in the code editor.
Ready when you are

Code is saved automatically in this browser and restored on your next visit. Clear code also deletes the local draft.

A few things to know

Does my JSON leave this browser?

No. Only the current code is saved locally in this browser, even if it is incomplete JSON. File names are not saved. Clear code deletes the draft; clearing site data also removes it. Theme and language preferences are saved separately. Page analytics do not send your JSON.

Which JSON can I process?

Strict JSON, including scalar values. Imports up to 5 MiB; editable documents up to 20 MiB, 256 levels and 100,000 nodes. Large numbers and duplicate keys are preserved.