Encoders & Decoders

10 free tools available

Encode and decode data with our free online tools. Convert text to Base64, encode URLs for safe transmission, decode JWT tokens, and work with HTML entities. All tools run locally in your browser—your data never leaves your device.

Instant Encoding

Real-time conversion

JWT Inspection

Decode tokens safely

Timestamp Converter

Unix to date & back

Available Encoding Tools

Encoders

Base64 Encoder/Decoder

Encode text or files to Base64, or decode Base64 strings back to original content.

Text/File→Base64
Encoders

URL Encoder/Decoder

Encode special characters for URLs or decode percent-encoded strings.

Text→Encoded URL
Encoders

JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and verify signatures.

JWT→Decoded JSON
Encoders

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Supports milliseconds.

Timestamp/Date→Date/Timestamp
Encoders

Regex Tester

Test regular expressions with real-time matching. Explains patterns and captures groups.

Pattern + Text→Matches
Encoders

Text Diff Checker

Compare two texts and highlight differences. Supports side-by-side and inline views.

Two Texts→Diff View
Encoders

Base64 Decoder

Decode Base64 strings back to original text content.

Base64→Text
Encoders

URL Decoder

Decode percent-encoded URL strings back to readable text.

Encoded URL→Text
Encoders

HTML Entity Encoder

Convert special characters to HTML entities for safe display.

Text→HTML Entities
Encoders

HTML Entity Decoder

Convert HTML entities back to readable characters.

HTML Entities→Text

Encoders & Decoders FAQ

Encoding transforms data into a different format for transmission or storage (like Base64). Encryption secures data with a key. Encoding is reversible by anyone; encryption requires the key.

Use Base64 when you need to include binary data (like images) in text-based formats like JSON, HTML, CSS, or emails. It converts binary to ASCII text.

URL encoding replaces special characters with percent-encoded values (like %20 for space). It's needed when including special characters in URLs or query parameters.

Yes! Our JWT decoder shows the header and payload of any JWT. Note: we don't verify signatures as that would require the secret key.

About Encoding & Decoding

For Web Development

URL encoding for query parameters, Base64 for data URIs, HTML entities for safe content display. Essential tools for every web developer.

For API Development

Decode JWT tokens for authentication debugging, convert timestamps for API requests, and encode special characters for safe transmission.