Encoders & Decoders

Encode and decode data in various formats

Browse our collection of 4 free encoders & decoders tools below. Every tool works entirely in your browser — no data is uploaded to servers, no account is needed, and results appear instantly. These tools are part of our Developer Tools category.

Base64 Encoder/Decoder

Encode and decode Base64 strings instantly. Free online Base64 converter tool for text and files. Works entirely in your browser.

URL Encoder/Decoder

Encode or decode URL strings. Converts special characters to percent-encoding and back. Free online URL encoder/decoder.

HTML Entity Encoder

Encode HTML special characters to entities or decode entities back to characters. Prevent XSS and display HTML safely.

JWT Decoder

Decode JWT tokens to see header and payload. Check expiration status. No data sent to server. Free online JWT decoder.