Free online converters

Converts JSON to CSV in the browser and states that data is not sent to a server.

Unit converter for length, mass, temperature, currency and many other quantities, installable as a web app.

Unit conversion and calculation tool that accepts natural queries like 'miles to km' and checks dimensions.

Translates bash shell scripts into Windows batch files.

Converts files between formats inside your browser using WebAssembly and ffmpeg, so nothing is uploaded.

Converts optical flow (.flo) files into images and can compile them into a video.

Converts Clash client outbound proxy settings into the sing-box format.

Converts DuckyScript (USB Rubber Ducky) scripts into Python applications.

Converts between Unix epoch timestamps and human-readable dates.

Online converter that turns MySQL dump SQL into SQLite-compatible SQL.

Converts pasted or uploaded CSV into JSON.

Converts epoch seconds, epoch milliseconds or date strings to and from readable dates.

Turns pasted JSON into CSV.

Turns pasted JSON into tab-separated values.

Converts JSON to YAML.

Converts numbers between binary, decimal, hexadecimal and other bases.

Creates a QR code from text in three sizes, with an optional centre logo and PNG download.

Paste an epoch number to see the calendar date and time it stands for.

Converts tab-separated values into structured JSON.

Converts XML into JSON.

Converts YAML into JSON.

Converts Markdown to HTML in a side-by-side playground.

Decodes Base64 strings back to text or a downloadable file.

Encodes text or files into Base64 with charset and URL-safe options.