Free Online Encoding & Decoding Tools

Escape and unescape strings for JSON, JavaScript, Python, HTML, and URL encoding.

Convert between Base64 and hexadecimal encoding formats with configurable output options.

Convert between UTF-8 text and binary (8-bit bytes). Handles emoji and non-ASCII correctly.

Convert comma-separated CSV data to tab-separated values while preserving quoted commas, quotes and line breaks.

Encode HTML entities (named, numeric, hex) and decode entity-encoded strings for safe HTML rendering.

Encode text as Morse code and decode Morse back to text. Letters, digits, and punctuation.

Classic shift ciphers — ROT13 (self-inverting), ROT47 (ASCII), or a custom Caesar shift.

Encode any string to Base64 and decode Base64 back to its original text instantly.

Convert SVG markup into a compact percent-encoded data URI for CSS backgrounds and HTML image sources.

Convert text to hexadecimal bytes and hex back to text with full UTF-8 and Unicode support.

Encode text as JavaScript Unicode escape sequences and decode Unicode escapes, including emoji surrogate pairs.

Decode percent-encoded URLs and query parameters back to plain text with full Unicode support.

Percent-encode special characters in URLs and decode encoded strings back to plain text.

Encode UUIDs to compact Base64 strings and decode Base64 back to standard UUID format.