JSON viewer and formatter

Use it locally

Format or minify JSON without rounding large numbers. Duplicate keys are reported instead of silently discarded.

Change settings to clear the old result. Reset clears inputs and downloads; cancellation terminates the task worker. Clearing references does not promise secure physical memory erasure.

Know the limits

JSON input: 1 MiB, depth 100 and 10,000 data nodes. Tree previews show at most 2,000 nodes; the download contains the full validated result.