PocketKit
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.
Start here
Related tools
Decision guide
Choose by input and intended output
| Task | Best-fit tool | Output |
|---|---|---|
| Convert JSON, CSV and YAML | Data Converter | Structured data; validate field types after conversion |
| Encode text or binary for transport | Base64 Encode/Decode | Base64 text; encoding is not encryption |
| Convert length, weight or temperature | Unit Converter | Numeric result with units |
| Encode international domain names | Punycode | Unicode and ASCII domain representations |
FAQ
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.