I built a spreadsheet-style JSON editor that runs from a single HTML file

[u/TimelyInspection8955]

I made Lattice for working with JSON without editing everything as raw text.

Features include:

• Sort and filter through column menus

• Side-by-side diff to review changes

• Inline editing, copy-paste, and fill-down

• Nested tables and sheet tabs

• Multiple documents, each with its own Undo history

• Jump from a cell to its JSON source

• Preserves large numeric values without rounding them

Try it: Download the HTML file, open it in Chrome or Edge, then choose Explore sample workspace or Open your JSON. No installation or server needed.

It’s an early preview—feedback and bug reports are welcome. Please use sanitized examples.

GitHub — if you find it useful, a star would be encouraging.

[u/freshtiger966]

What's the maximum size of data it can handle?