Browser-based utilities

Developer tools that stay on your device.

Encode, decode, format, convert, and generate common developer values without sending your input to a server.

Runs locally No account Free utilities

Quick access

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Encoding

Base64 Encode and Decode Online

Private by default

These tools run locally in your browser whenever possible. Your text, tokens, timestamps, and JSON snippets are processed on your device and are not uploaded by this static page.

Built for quick checks

Use CodeKitBox for everyday development tasks: decoding a JWT payload, formatting JSON, converting Unix time, generating UUIDs, or testing a regular expression against sample text.

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Browse Individual Tools

Base64 Encoder & Decoder URL Encoder & Decoder JWT Decoder Unix Timestamp Converter JSON Formatter UUID Generator SHA Hash Generator Regex Tester Text Diff Checker CSV / JSON Converter Text Cleaner Case Converter HTML Entity Converter URL Parser

Frequently Asked Questions

Are these tools free?

Yes. The first version is free and does not require an account.

Is my data uploaded?

No server upload is required for the included tools. They are designed to run in your browser.

Can I use the decoded JWT as proof of validity?

No. This tool decodes JWT header and payload data for inspection. It does not verify signatures or prove that a token is trusted.