Every JSON tool, in one tab.
Four sharp tools for working with JSON — a tree viewer, a syntax and schema validator, a visual comparator and a formatter and minifier. All free, all ad-free, and every one of them parses your document in this tab rather than on a server.
Choose a tool
4 tools · more coming
JSON Formatter
Pretty-print an unreadable response, or minify it.
- Pretty-print
- Minify to one line
- Sort keys
- Indent 2 / 4 / tab
JSON Viewer
Explore a payload too big to scroll through.
- Collapsible tree
- Search keys and values
- Copy any path
- Handles 100k+ nodes
JSON Validator
Find the exact line something is rejecting.
- Exact line and column
- JSON Schema 2020-12 / 2019-09 / 07
- Jump to each error
JSON Comparator
See what actually changed between two documents.
- Structural diff
- Ignores key order
- Matches array items by id
- Side-by-side
Nothing you paste is uploaded
Every tool here is JavaScript running in your own tab. Paste a production payload with the network disconnected and it still works — there is no server of ours that could receive it.
No ads, no account, no limit
No interstitials, no sign-up and no cap on how much you can paste. The page you land on is the tool.
Built for large documents
Parsing, validation and diffing run on a worker thread, so a multi-megabyte document is worked without the page seizing while you type.
Check the claim in your Network panel.
How that is true