Online Text Encoder, Decoder & Transformer

io9.me Text Tools provides a suite of text encoding, decoding, and transformation utilities that run entirely in your browser. Encode strings to Base64 for embedding in data URIs, URL-encode query parameters, escape HTML to prevent XSS, or convert between letter cases.

Available transformations

• Base64 Encode / Decode — convert binary data or text to and from Base64
• URL Encode / Decode — percent-encode special characters for safe use in URLs
• HTML Escape / Unescape — replace angle brackets, ampersands, and quotes with entities
• JavaScript Escape / Unescape — handle backslash sequences in JS strings
• Uppercase, lowercase, Title Case, camelCase, snake_case, kebab-case conversion

How to use

1. Paste or type text into the input area.
2. Select the desired transformation from the toolbar.
3. The result appears instantly in the output area.
4. Copy or download the result.

Common use cases

Encode API tokens for HTTP headers, URL-encode query strings, escape user input before embedding in HTML, convert variable names between naming conventions, and decode Base64-encoded payloads from JWTs or emails.

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