Free Online Tools for Text, Data, Files & More

Fast, free browser-based tools to format, convert, clean, compare, encode, and analyze text, data, and files. Everything runs locally in your browser — no uploads and no account required.

For all those annoying little jobs that shouldn't require installing software.

What do you need to do?

Text Tools

Clean, transform, search, replace, analyze, and convert text.

Data Tools

Format, validate, query, and convert JSON, CSV, YAML, XML, and other data.

File Tools

Compare, convert, process, and work with files directly in your browser.

Utilities

Generate UUIDs and QR codes, work with timestamps, check contrast, and more.

Private by design

Your data stays on your device. SwITss Knife processes your text and files directly in your browser. Your data isn't uploaded to a server, and you don't need an account to use the tools.

Simple tools. No uploads.

SwITss Knife is a collection of free online utilities for everyday text, data, and file tasks. Format JSON, convert CSV, test regular expressions, compare text, generate QR codes, process documents, and more — without sending your data to a server.