llms-full.txt

# WebDev-Tools — Full Reference for AI Language Models

> Version: 2.1.2
> Last updated: 2026-04-17
> Language: English
> Canonical: https://webdev-tools.info/llms-full.txt

WebDev-Tools is a privacy-first, client-side developer toolbox. All 20 tools run entirely in the user's browser. No data is transmitted to any server. The project is built with PHP (server-side rendering), vanilla JavaScript (IIFE modules), and Bootstrap 5.3.

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## Site Structure

- Homepage: https://webdev-tools.info/
- About: https://webdev-tools.info/about.php
- Privacy Policy: https://webdev-tools.info/privacy.php
- Imprint: https://webdev-tools.info/imprint.php
- Author: Ramon Kaes <ramon.kaes@webdev-tools.info>

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## Tool Reference

### Base64 Encoder/Decoder
URL: https://webdev-tools.info/base64-encoder-decoder/
Category: Encoders & Decoders
Features: Encode text or files to Base64; decode Base64 back to text or binary. Supports drag-and-drop file upload, live mode (real-time encoding/decoding), URL-safe Base64 variant.
Input: Plain text or binary file
Output: Base64 string, or decoded text/file download

### URL Encoder/Decoder
URL: https://webdev-tools.info/url-encoder-decoder/
Category: Encoders & Decoders
Features: Percent-encode special characters in URLs; decode percent-encoded strings. Bulk processing mode, URL component parsing (protocol, host, path, query, fragment).
Standards: RFC 3986

### HTML Entity Encoder/Decoder
URL: https://webdev-tools.info/html-entity-encoder-decoder/
Category: Encoders & Decoders
Features: Encode special characters as named HTML entities (e.g. &amp;) or numeric entities (&#38; / &#x26;). Bidirectional conversion.

### JWT Decoder
URL: https://webdev-tools.info/jwt-decoder/
Category: Encoders & Decoders
Features: Decode JWT tokens (header, payload, signature). Verifies token expiry (exp claim), detects signing algorithm (HS256, RS256, etc.). Purely client-side — private keys never required.
Note: Does NOT verify signature cryptographically (private key not available client-side).

### Punycode Converter
URL: https://webdev-tools.info/punycode-converter/
Category: Encoders & Decoders
Features: Convert IDN (internationalized domain names) between Unicode and Punycode/ACE format. Auto-detects input direction. Supports bidirectional conversion.
Example: münchen.de ↔ xn--mnchen-3ya.de

### JSON Formatter & Validator
URL: https://webdev-tools.info/json-formatter-validator/
Category: Formatters
Features: Pretty-print JSON with configurable indent (2 or 4 spaces). Validate JSON syntax with error highlighting. Minify JSON. Interactive tree view for exploring nested structures. Syntax highlighting.

### Code Formatter
URL: https://webdev-tools.info/code-formatter/
Category: Formatters
Features: Format HTML, CSS, JavaScript, TypeScript, JSON, XML, Markdown. Browser-based formatting without sending code to external servers.

### UUID Generator
URL: https://webdev-tools.info/uuid-generator/
Category: Generators
Standards: RFC 4122 UUID v4
Features: Generate cryptographically random UUID v4 values. Bulk generation (1–1000 UUIDs at once). Copy to clipboard or download as text file. Uses Web Crypto API (crypto.randomUUID / crypto.getRandomValues).

### Password Generator
URL: https://webdev-tools.info/password-generator/
Category: Generators
Features:
- Random password: configurable length, character sets (uppercase, lowercase, digits, symbols)
- Passphrase: word-based (diceware-style) with configurable word count and separator
- Pattern-based: custom format strings
- Strength meter with entropy calculation
- No passwords are stored or transmitted

### Hash Generator
URL: https://webdev-tools.info/hash-generator/
Category: Generators
Algorithms: MD5, SHA-1, SHA-256, SHA-384, SHA-512
Features: Hash text input or uploaded files. Uses SubtleCrypto API for SHA variants. MD5 is implemented in pure JavaScript. File hashing reads files locally via FileReader API.

### Lorem Ipsum Generator
URL: https://webdev-tools.info/lorem-ipsum/
Category: Generators
Features: Generate classic Lorem Ipsum placeholder text. Output modes: paragraphs, sentences, words. Configurable quantity. Copy to clipboard or download.

### QR Code Generator
URL: https://webdev-tools.info/qr-code-generator/
Category: Generators
Features: Generate QR codes from any text, URL, or data string. Configurable error correction level (L/M/Q/H). Download as SVG or PNG. Uses qrcode-generator library (client-side).

### PX to REM Converter
URL: https://webdev-tools.info/px-to-rem-converter/
Category: Converters
Features: Convert pixel values to REM based on a configurable base font size (default 16px). Live calculation, conversion tables for common values, Tailwind CSS spacing scale reference.

### Data Converter
URL: https://webdev-tools.info/data-converter/
Category: Converters
Formats: JSON ↔ CSV, JSON ↔ XML, JSON ↔ YAML, JSON ↔ TOML
Features: Bidirectional conversion between data formats. Timestamp conversion (Unix ↔ ISO 8601). Multiple format support in a single tool.

### Aspect Ratio Calculator
URL: https://webdev-tools.info/aspect-ratio-calculator/
Category: Converters
Features: Calculate missing dimension for a given aspect ratio. Common presets (16:9, 4:3, 1:1, 21:9, etc.). CSS padding-top trick generator for responsive containers. Useful for responsive image/video design.

### String Escaper
URL: https://webdev-tools.info/string-escaper/
Category: String Tools
Modes: JavaScript, JSON, HTML, CSS, SQL
Features: Escape and unescape strings for the selected context. Handles special characters, quotes, newlines, Unicode escapes.

### Character Reference
URL: https://webdev-tools.info/character-reference/
Category: References
Features: Searchable table of HTML character entities. Columns: character, named entity, decimal entity, hex entity, Unicode code point, CSS escape. Category filter (Latin, Greek, Math, Arrows, etc.). Copy any code with one click.

### Emoji Reference
URL: https://webdev-tools.info/emoji-reference/
Category: References
Features: Searchable emoji table with categories. Copy emoji character or code point. Filter by category or keyword search.

### SRI Generator
URL: https://webdev-tools.info/sri-generator/
Category: Utilities
Features: Generate Subresource Integrity hashes for scripts and stylesheets. Copy the hash value for use in integrity attributes.

### Regex Tester
URL: https://webdev-tools.info/regex-tester/
Category: Utilities
Features: Live regular expression testing with real-time match highlighting. Supported flags: g, i, m, s, u, y. Group extraction (named and unnamed capture groups). Match count and position display. Download match results.

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## Technology Stack

- Server: PHP 8.x with declare(strict_types=1)
- Frontend: Vanilla JavaScript (IIFE modules, no framework)
- CSS: Bootstrap 5.3 + custom CSS (client-side dark mode via data-bs-theme)
- Icons: Bootstrap Icons
- Build: Custom bash build script, no bundler
- Tests: Jest (810 unit tests, 20 test suites)
- Languages: 6 (en, de, es, pt, fr, it) — i18n via JSON + hardcoded PHP content

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## Privacy Architecture

- Zero server-side data processing for tool inputs
- No cookies, no sessions for tool usage
- No third-party analytics or tracking scripts
- Content Security Policy (CSP) enforced
- All sensitive values (passwords, hashes, JWT tokens, keys) remain in browser memory only
- External libraries loaded via CDN with Subresource Integrity (SRI) hashes

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## Sitemap

Full sitemap index: https://webdev-tools.info/sitemap.xml
English: https://webdev-tools.info/sitemap-en.xml
German: https://webdev-tools.info/de/sitemap.xml
Spanish: https://webdev-tools.info/es/sitemap.xml
Portuguese: https://webdev-tools.info/pt/sitemap.xml
French: https://webdev-tools.info/fr/sitemap.xml
Italian: https://webdev-tools.info/it/sitemap.xml