Encoders & Decoders
Encode and decode Base64, URLs and more. Fast, private, and entirely client-side — nothing is uploaded.
22 tools in this category
Convert data between human-readable text and machine formats: Base64 for embedding binary data, URL percent-encoding for query strings, HTML entities, escape sequences and classic ciphers like ROT13 and Morse. Each page handles one direction or pairing clearly, shows errors instead of silently corrupting input, and works entirely offline in your browser — safe even for tokens and configuration snippets.
Base64 Encode / Decode Encode text to Base64 or decode Base64 back to text — UTF-8 safe. URL Encode / Decode Percent-encode text for URLs or decode encoded URL components. Base64 to Text Decode a Base64 string back into readable text (UTF-8 safe). Text to Base64 Encode any text, including emoji and accents, into a Base64 string. JSON to Base64 Encode a JSON document into a single Base64 string (UTF-8). CSV to Base64 Encode CSV data into a single Base64 string (UTF-8 safe). String to Byte Convert a string to its UTF-8 byte values in decimal (0–255). Byte to String Decode decimal byte values (0–255) back into a UTF-8 string. String to Int Convert a string to integer Unicode code points, space-separated. Code to ASCII Convert numeric character codes back into ASCII / readable text. UTF-8 to ASCII Strip text down to plain 7-bit ASCII, dropping non-ASCII characters. UTF-8 to Hex Convert UTF-8 text to hexadecimal byte values, two digits per byte. Hex to UTF-8 Decode hexadecimal byte values back into UTF-8 text. URL Encode Percent-encode text for safe use in a URL (encodeURIComponent). URL Decode Decode percent-encoded URL text back to readable form. HTML Encode Online Encode reserved HTML characters like < and & into safe entities. Escape Character Online Escape quotes, newlines and control characters with backslashes. Escape String Turn raw text into a backslash-escaped string for code. Unescape String Decode backslash escape sequences back into readable text. Test Printf Online Preview printf format strings with width, precision and flags. Morse Code Translator Translate plain text into Morse code dots, dashes and slashes. ROT13 to Text Encode or decode ROT13 text — the cipher is its own reverse.
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