Jsontify

Ad-free, fast, private JSON viewer & editor

Paste JSON, drop a file, or Open

Explorer

Tree explorer will appear here once JSON is loaded

Inspector

Select a node to inspect it

Paste or open a file to begin
🔒 Processed in your browser - nothing is uploaded to our servers

JSON Parser

Paste or drop a JSON file and Jsontify parses it the moment it lands - no server round trip, no upload progress bar, no file size warning until you're well past what most tools can handle. The parser runs in a background worker so the tab never freezes, even while the resulting tree, raw pane, and inspector are all being built from the same parse pass.

Under the hood, parsing is iterative rather than recursive, walking the document with an explicit stack instead of function calls, so a JSON file nested 10,000 levels deep parses cleanly instead of overflowing the browser's call stack - a case that trips up parsers built on plain recursive descent.

Numbers are read as raw lexemes from the source text, not converted through a JavaScript number, so an ID like 9007199254740993 or a long decimal price keeps every digit intact through parsing, display, and copy - nothing here silently rounds to the nearest float.

Once parsed, every value is one click away from its type, byte size, and JSONPath in the Inspector panel, and Cmd+K (or Ctrl+K) searches the whole parsed document instantly, including inside collapsed branches.

Frequently asked questions

How is this different from JSON.parse in the browser console?
The parser here runs off the main thread in a worker, preserves large numbers exactly instead of rounding them to a float, and hands the result straight to a searchable tree and inspector instead of a flat console object.
Can it parse very large or deeply nested JSON?
Yes - parsing is iterative rather than recursive, so documents nested thousands of levels deep and files up to 100 MB parse without overflowing the stack or freezing the tab.
Does parsing change my original text?
No - parsing only builds the tree and inspector views; your raw text pane stays exactly as pasted until you explicitly choose Format, Minify, or Repair.
Is the JSON I parse uploaded anywhere?
No. Parsing runs entirely in your browser - nothing is uploaded to our servers.