Free online format converters
Convert data, files, encodings and common units with free Base64, JSON, CSV, YAML, archive, byte and Punycode tools.
What can you do with these tools?
PocketKit converters cover common development and office inputs: convert structured data across JSON, CSV and YAML, encode or decode Base64, calculate units and bytes, and read common archives in your browser. Each tool page explains its supported inputs, outputs and data handling.
6 related tools
- Data Converter — Convert CSV / JSON / XML
- Base64 Encode/Decode — Convert text to/from Base64
- Unit Converter — Convert length, weight, temperature…
- ZIP Extractor — Unzip locally and download files
- Byte Calculator — Convert B / KB / MB / GB
- Punycode — IDN domain ⇄ Punycode
Choose by input and intended output
| Task or input | Tool | Decision criteria and limits |
|---|---|---|
| Convert JSON, CSV and YAML | Data Converter | Validate field types, dates, nulls and numeric precision |
| Encode text or binary for transport | Base64 Encode/Decode | Base64 changes representation and provides no encryption |
| Convert measurements | Unit Converter | Confirm input and output units |
| Encode international domain names | Punycode | Check that Unicode and ASCII domains correspond |
Recommended workflow
- Confirm input format and character encoding
- Choose the target format and convert
- Validate fields, precision or file contents
Frequently asked questions
Which conversions are supported?
Support varies by tool and currently includes JSON, CSV, YAML, Base64, common measurement units, byte units, Punycode and common archive formats.
Is conversion data uploaded to a server?
Most data, encoding and unit conversions run directly in your browser. Check the tool page for its data-handling details and avoid entering unnecessary secrets or passwords.
Can I download or copy converted results?
It depends on the tool. Text and data results can usually be copied, while file-based results generally provide a download action.