A growing toolbox of fast, privacy-friendly utilities for converting, formatting, compressing, and editing files - every single one runs 100% in your browser, so nothing you drop in ever leaves your device.
159 tools, and counting.
Most are free forever - 25 of the more advanced ones unlock with a free account.
Drop a file here
or click to choose a file
We'll open the right tool for .csv, .json, .parquet, .sqlite, .geojson, .gpx, .srt/.vtt, .avif, .sql and .tex files.
How does client-side processing work?
Every tool on HowToToolkit runs entirely in your browser. There's no upload, no server round-trip, and no copy of your file kept anywhere but your own device - close the tab and it's gone.
A sample of the toolkit - every tool gets its own page, whether it's featured here or not.