Free Online Developer Tools & Web Utilities
Fast, private, browser-based tools for developers and everyone else. No sign-up required — your data never leaves your browser.
⚡ Developer Tools
Format, validate, encode, and transform data
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JSON Formatter & Validator
Pretty-print, validate, and minify JSON data
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Base64 Encoder/Decoder
Encode and decode Base64 strings with UTF-8 support
#️⃣
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
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URL Encoder/Decoder
Percent-encode and decode URLs and query strings
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UUID Generator
Generate random UUID v4 and timestamp-based UUID v1
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Regex Tester
Test regular expressions with live highlighting and match details
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Markdown Preview
Write Markdown and see rendered HTML in real time
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Diff / Text Compare
Compare two texts line by line with color-coded diff output
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HTML Entity Encoder/Decoder
Encode and decode HTML entities with named entity support
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JWT Decoder
Decode and inspect JSON Web Token header, payload, and claims
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CSS Minifier / Beautifier
Minify CSS for production or beautify it for readability
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JS Minifier / Beautifier
Minify JavaScript for production or beautify for readability
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SQL Formatter
Format, beautify, or minify SQL queries
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Cron Expression Generator
Build cron schedule expressions with a visual editor
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robots.txt Generator
Create robots.txt files with AI crawler blocking support
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Meta Tag Generator
Generate SEO meta tags, Open Graph, and Twitter Card tags
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Open Graph Preview
Preview how your page looks when shared on social media
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.htaccess Generator
Generate .htaccess rules for redirects, security, caching, and CORS
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HTTP Header Analyzer
Analyze HTTP response headers for security and best practices
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Chmod Calculator
Calculate Unix file permissions in numeric and symbolic notation
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Base64 Image Encoder
Convert images to Base64 data URIs for embedding in HTML/CSS
📝 Text Tools
Count, convert, compare, and transform text
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Word & Character Counter
Count words, characters, sentences, paragraphs, and reading time
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Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words
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Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, and more
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Slug Generator
Convert any text into a clean, URL-friendly slug
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Sort Lines
Sort lines alphabetically, numerically, by length, or randomly
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Remove Duplicate Lines
Remove duplicate lines from text with flexible matching options
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Find & Replace
Search and replace text with regex support and live highlighting
🎨 Color Tools
Pick, convert, and generate color palettes
🔢 Math & Conversion
Calculate, convert units, and transform numbers
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Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
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Percentage Calculator
Calculate percentages, percentage change, and increase/decrease
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Number Base Converter
Convert between decimal, binary, octal, and hexadecimal
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Byte / Data Size Converter
Convert between bytes, KB, MB, GB, TB, and PB
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Unit Converter
Convert length, weight, temperature, area, volume, speed, and time
🛠️ Misc Tools
Passwords, security, and other useful utilities
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Password Generator
Generate strong, cryptographically secure random passwords
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QR Code Generator
Create QR codes with custom colors and error correction
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Favicon Generator
Create favicons from text, emoji, or images with ICO and PNG export
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Privacy Policy Generator
Generate a customizable privacy policy for your website
About WebUtil.io
WebUtil.io is a collection of free, fast, and private online tools for developers and web users. Every tool runs entirely in your browser — no data is ever sent to our servers. No account needed, no limitations, completely free.
Why Use WebUtil.io?
- 100% Private — All processing happens in your browser. Your data never leaves your device.
- No Sign-Up — Every tool is available instantly, no registration required.
- Lightning Fast — Client-side tools with zero server round-trips mean instant results.
- Mobile Friendly — All tools work on desktop, tablet, and mobile devices.
- Free Forever — Core tools will always be free to use.