Changelog | GigaJSON

What's new in GigaJSON, newest first.

2 October 2026

Long numbers stay exact

Some files hold numbers too long for a browser to keep exactly, like 20-digit IDs. GigaJSON now opens them, tells you which numbers are affected, and keeps your original file as it was. It asks before you save, export or share a copy where those numbers are rounded.
Fixed: opening a big file from the home page could show the sample document instead of your file.

1 October 2026

Sample JSON, CSV and XML files in any size from 100 KB to 1 GB, made from the kind of data you pick.
The Large JSON File Generator shows the file as it's written, with its size and speed. Stop it any time, then download the file or open it in GigaJSON.

1 October 2026

JSON Lines Viewer: open log files and data exports with one record per line, up to 1 GB, as a table or a tree.
JSON Path Finder: click any value to get the path that points to it, ready to paste into a query or your code.
JMESPath Playground: try JMESPath queries on your JSON as you type.
Large JSON File Generator: realistic test data in the size you need, to download or open in GigaJSON.
Fixed: a few unusual key names were wrongly marked as errors in the tree.

1 October 2026

A blog with five articles: opening large JSON files, fixing invalid JSON, jq vs JSONPath vs JMESPath, converting JSON to CSV, and reading API responses and log files. Every command in them was tried before it was written down.

1 October 2026

Repair no longer removes backslashes it can't make sense of, like the ones in a Windows path such as C:\Users\ana. See changes shows the lines where they were kept.

30 September 2026

GigaJSON now counts which views and tools are used, and reports errors so we can fix them. It never sends your documents, their names or the addresses you open. The privacy policy explains what is sent.

30 September 2026

A new logo: a chiseled G with a blue block of data.
A home page at gigajson.com, and the app moved to gigajson.com/app/. Your documents are kept, and if you already use GigaJSON, gigajson.com takes you straight to the app.
Nine new free tools: JSON Visualizer, JSON Diff, JSONPath Tester, jq Playground, JSON Schema Generator, YAML to JSON, JSON Lines to JSON, JWT Decoder and JSON Escape. That makes 20.
Code colours: pick GitHub, One, Dracula, Monokai, Solarized or Nord colours for code (Preferences → Code colours, or the menu at the top of the tools).
YAML files with repeated sections or several documents in one file now open correctly.
This changelog, a privacy policy and terms of use.

29 September 2026

Graph tab: your document as boxes and links. Open and close branches, zoom and pan, and save it as an image. It stays fast on huge documents by drawing only what you open.
Inspector: select a value to see where it sits, its type and size, and a preview of colours, dates, images, video and audio (loaded only when you ask). It also shows the same field in the other items of its list.
Free tool pages: formatter, validator, minifier, repair, large-file viewer and converters between JSON, CSV, XML, YAML and TypeScript.

29 September 2026

Broken JSON can be repaired in one click: missing quotes or commas, extra commas, comments, cut-off files and JSON copied from AI chats. "See changes" shows every line that changed, and nothing is changed without asking.

29 September 2026

JSON pages open in a GigaJSON viewer (tree, table, graph, text, query) instead of raw text, in Chrome and Firefox. Large responses open in about a second.
Open a selection or a link in GigaJSON from the right-click menu.

29 September 2026

Open XML files as JSON, and save any document as XML.
Documents up to 1 GB: the tree, table and queries stay responsive, and parts of documents too big for the editor can still be edited as text.

29 September 2026

A JSON workspace in your browser with tree, code, table, query, transform, diff and type views, plus version history. Nothing is uploaded.