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Data

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ASCII Code to Text Converter Online — Free

Turns a list of decimal ASCII codes back into readable text. Space, comma or newline separated input, decoded in your browser tab.

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Base64 to File Decoder Online — Download

Paste a Base64 string, set a filename with its extension and download the decoded file. Data URL prefixes are accepted and stripped automatically.

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Base64 to Text Decoder Online — Free

Turns a Base64 string back into readable text — Kubernetes secret values, email headers, JWT payloads. UTF-8 content, including Cyrillic, decodes correctly.

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Binary to Text Converter Online — Free Decoder

Decode binary back into readable text online. Paste space-separated bytes, press Convert and copy the string; UTF-8 multi-byte sequences are reassembled correctly.

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Caesar Cipher Online — Encrypt and Decrypt Shift

Classic Caesar shift cipher with a step from 1 to 25. Encrypt a phrase or decrypt someone else's; letter case is preserved and digits and punctuation pass through.

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File to Base64 Encoder Online — Free

Pick any file and get its Base64 representation as a single string, ready to embed in CSS, HTML or a JSON payload without hosting the file.

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Hex to Text Converter Online — Decode Hex

Decode a hex string back to readable text online. Paste bytes spaced (48 65 6c) or unbroken (48656c); non-hex characters are stripped before decoding.

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HTML Entity Decoder Online — Unescape HTML

Turns ", П and   back into ordinary characters. Paste the escaped text, press decode and copy the readable result.

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HTML Entity Encoder Online — Escape HTML

Replaces angle brackets, ampersands and quotes with <, & and " so that markup displays as text instead of rendering.

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JWT Decoder Online — Read Header and Payload

Shows what is inside a JSON Web Token: the algorithm from the header and every claim in the payload. Decoding only — the signature is not verified.

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Morse Code Translator Online — Encode and Decode

Translate text into Morse and decode dots and dashes back into letters. Two buttons, Encode and Decode; letters are space-separated and words split by a slash.

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Random String Generator Online — Free

Generate a random string of 1 to 256 characters, with checkboxes for upper case, lower case, digits and the !@#$% symbols.

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ROT13 Encoder and Decoder Online — Free Tool

Apply ROT13 in one click. Because the shift is thirteen, the same action encodes and decodes; digits and non-Latin characters are left untouched.

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Text to Base64 Encoder Online — Free

Encodes text into a Base64 string for a Basic Auth header, a Kubernetes secret value or an environment variable. Unicode input is handled as UTF-8.

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Text to Binary Converter Online — Free Encoder

Turn any string into space-separated eight-bit binary. Latin letters take one byte each, Cyrillic and emoji expand into several UTF-8 bytes shown in order.

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Text to Hex Converter Online — Char Codes

Turn any string into hexadecimal online. Each character becomes its code, values are space-separated, and Clear empties both boxes for the next test.

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URL Decoder Online — Percent Decoding

Turns %20, %D0%9F and plus signs back into readable characters. Paste a link or a single query parameter and read the decoded value.

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URL Encoder Online — Percent Encoding

Converts spaces, non-Latin letters and characters like & ? = into safe %20 and %D0%9F sequences ready to drop into a query parameter.

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UUID v4 Generator Online — Single and Bulk

Generate a version 4 UUID online: one value per click, or ten at once with Bulk (10). The identifier is computed by your browser, not a server.

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Vigenere Cipher Online — Encrypt With a Keyword

Polyalphabetic Vigenere cipher with a keyword. Each letter gets its own shift taken from the key, so brute-forcing twenty-five variants no longer breaks the message.

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Category guide

About Data

Base64, HEX, binary, URL encoding, ASCII, Morse code, Caesar and Vigenere ciphers, UUID and random string generators.

This subcategory gathers string and file transformations: encoding data for transport, decoding a string you received, inspecting a JWT, generating an identifier or a random sequence. Teaching ciphers live here too. Every converter is paired and computes in the browser, so tokens and keys never leave your device.

  • Encode a file or string as Base64 and back
  • Decode a JWT to inspect its payload
  • Generate a UUID or a random string of a given length
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ASCII Code to Text Converter Online — Free Base64 to File Decoder Online — Download Base64 to Text Decoder Online — Free Binary to Text Converter Online — Free Decoder Caesar Cipher Online — Encrypt and Decrypt Shift File to Base64 Encoder Online — Free Hex to Text Converter Online — Decode Hex HTML Entity Decoder Online — Unescape HTML HTML Entity Encoder Online — Escape HTML JWT Decoder Online — Read Header and Payload Morse Code Translator Online — Encode and Decode Random String Generator Online — Free ROT13 Encoder and Decoder Online — Free Tool Text to Base64 Encoder Online — Free Text to Binary Converter Online — Free Encoder Text to Hex Converter Online — Char Codes URL Decoder Online — Percent Decoding URL Encoder Online — Percent Encoding UUID v4 Generator Online — Single and Bulk Vigenere Cipher Online — Encrypt With a Keyword