UD5 Toolkit
SMD Resistor Code Decoder - Online 3-Digit & EIA-96 Markings
Decode SMD resistor markings (3-digit, 4-digit, EIA-96) to resistance value. Enter code and get ohms instantly. Handy for PCB repair.
HTML Entity Encoder & Decoder - Online Escape Tool
HTML Entity Encoder & Decoder
Escape or unescape HTML special characters instantly. Safe, private, and free for web developers.
Frequently Asked Questions
HTML entity encoding replaces special characters (like <, >, &) with their safe equivalent strings (
<, >, &). This prevents browsers from interpreting them as active markup.Encoding prevents cross‑site scripting (XSS) and ensures that user‑generated content displays correctly without being executed as code. It's essential for embedding untrusted data into HTML pages.
The tool encodes the five main XML/HTML special characters:
& → &, < → <, > → >, " → ", and ' → '. Check "Extended" to convert all non‑ASCII characters to numeric entities.Named entities like
< are easier to read, while numeric entities (< for <, < in hex) use code points. Both are valid and supported by all browsers.Yes, the decoder correctly handles all standard HTML entities (named, decimal
{, and hex <). Just paste your encoded string and press Decode.Absolutely. This encoder/decoder runs entirely in your browser using client-side JavaScript. No text is ever sent to any server, keeping your data private and secure.
Unicode Escape Sequence Decoder - Online Convert \u0041 to A
Paste text with \uXXXX or \xXX escape sequences and decode to readable characters. Works for all Unicode planes.
SVG URI Encoder - Online Optimized for CSS Background
Paste an SVG and get an optimized, URL‑encoded data URI for use in CSS backgrounds. Reduces file size and escapes characters.
HTML Symbol Entities Cheatsheet - Online Search & Copy
Search and copy HTML entities for arrows, math, currency, and symbols. See the glyph and code. Fast reference.
WASM Audio Decoder - Online Play FLAC/Opus Locally
Decode FLAC, Opus, or OGG audio files in the browser using compiled WASM libraries. Play instantly without server uploads. Keep audio private.
WebCodecs Video Frame Reader - Online Decode & Display
Decode individual video frames from a local file using the VideoDecoder API. Step through frames. Cutting‑edge browser feature.
Shift Cipher Encoder - Online Caesar & ROT0‑25
Apply a classic Caesar shift cipher with any key. Encrypt or decrypt text instantly. Brute force option included.
Hex to Float Converter - Online IEEE 754 Decoder
Enter a hexadecimal string and decode it as a 32‑bit or 64‑bit floating‑point number. Low‑level developer tool.
Morse Code to Text Translator - Online Decoder
Paste Morse code (dots and dashes) and translate it back to plain English text. Supports standard timing. Local.
ASCII Binary to Text - Online Decode Bits
Paste a string of 0s and 1s and decode it back into ASCII text. Handles space‑separated blocks. Local.
SVG to Data URI Encoder - Online Inline SVG Generator
Paste an SVG and get a ready‑to‑use data URI for CSS backgrounds or img tags. Optimized with URL encoding. All local.
Phonetic Alphabet to Text - Online Decode Alpha Bravo
Reverse the NATO phonetic alphabet. Paste 'Bravo Romeo Alpha Victor Oscar' and get 'Bravo'. Essential for call center transcripts.
Text to Number Code - Online A1Z26 Encoder
Encode letters to their position in the alphabet (A=1, B=2...) and decode back. A classic puzzle tool. No data leaves your device.
HTML Escape/Unescape Live Preview - Online Sandbox
Type raw HTML and see the escaped version, then see how it renders when unescaped. Understand encoding better.
Emoji Cipher Decoder - Online Secret Message Fun
Decode a message hidden in a string of emojis (each emoji maps to a letter). Fun game for kids. Create your own.
Base62 Encoder & Decoder - Online Shorten IDs
Encode text or numbers into base62 (0‑9a‑zA‑Z) and decode back. Ideal for shortening integer IDs and URLs. Local.
Named HTML Entities Reference - Online Quick Chart
Searchable grid of all named HTML character entities with previews. Click to copy &, <, © etc. For web devs.
Pigpen Cipher Encoder - Online Masonic Symbol Translator
Encrypt text into the classic pigpen symbols and decode them back. Fun for treasure hunts and mystery games.
Text to Unicode Escape Sequence Converter - Online
Convert any text into JavaScript‑style \uXXXX escape sequences and vice versa. Handles emojis. Useful for i18n development.
Text to Morse Code Decoder - Online CW Translation Tool
Translate text to Morse code with audio playback. Adjust speed and tone. An educational tool for amateur radio enthusiasts. Works offline.
Text to Hex Converter - Online String to Hexadecimal Encoder
Convert any text string to a sequence of hexadecimal pairs. Useful for programming and data representation. All conversion happens locally in your browser.
Hex to Text Converter - Online Hexadecimal Decoder
Decode hexadecimal values back to human-readable text. Ideal for debugging and data recovery. Works fully offline in your browser, keeping your data secure.
Binary to Text Converter - Online Decode Bits to String
Paste binary sequences and convert them back to readable text. Supports space-separated and 8-bit formatted strings. Quick encoding reconversion.
Caesar Cipher Encoder & Decoder - Online Shift Cipher Tool
Encrypt and decrypt messages using the classic Caesar cipher with configurable shift key. Fun for puzzles and basic cryptography lessons. Entirely browser-based.
JWT Debugger - Online JSON Web Token Decoder & Verifier
Decode the header and payload of a JSON Web Token (JWT) without verifying the signature. Inspect claims securely on the client side. Great for developers.
ROT13 Encoder & Decoder - Online Caesar Cipher ROT13
Easily apply ROT13 cipher to obfuscate or reveal text. A classic letter substitution cipher that works bidirectionally. Purely client-side processing.
Morse Code Translator - Online Morse Encoder & Decoder
Translate text to Morse code and decode Morse signals back to text. Sound playback supported. Learn and experiment with Morse code directly in browser.
Base32 Encoder & Decoder - Online Base32 Converter
Encode or decode text using Base32 scheme. Ideal for legacy systems and data obfuscation. Works completely offline in your browser for maximum security.
URL Encoder & Decoder - Online Percent Encoding Tool
Encode special characters into URL-safe format or decode percent-encoded strings back to plain text. Fast and reliable, runs locally in your browser.
Base64 Encoder & Decoder - Online Base64 Converter
Convert text and files to Base64 or decode Base64 back to original content. Processed locally with no server upload, ensuring complete data security.