Developer Tools That Run in Your Browser
Free. Fast. Secure. No tracking. All processing happens locally in your browser. Your data never leaves your device.
Popular Tools
Most used developer utilities and converters
Number Base Converter — Binary, Hex, Decimal & Octal
conversion
Convert numbers between binary, hexadecimal, decimal, octal, and any custom base (2-36) instantly. Free, private, no sign-up — all processing happens in your browser.
Base64 Decoder & Encoder
encoding
Decode and encode Base64 online for free. Real-time conversion with full UTF-8 and emoji support. 100% private — runs in your browser. No signup needed.
Image Compressor
conversion
Reduce image size up to 80% — compress JPEG, PNG & WebP in your browser, no upload needed. Batch 20 images, adjust quality, compare before & after. Free & private.
JSON Formatter & Validator
encoding
Format, validate and beautify JSON instantly in your browser. Free online tool with syntax validation, error detection, minify and one-click copy. 100% private.
Length Unit Converter — Metric, Imperial & More
conversion
1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1.609 km. Convert between 16 length units instantly — metric, imperial, nautical & astronomical. Free, private, runs in your browser.
MD5 Hash Generator & File Checksum Tool
security
Generate MD5, SHA-256, SHA-1 & SHA-512 hashes online for free — no signup, 100% in-browser. Hash text or files instantly, verify checksums, compare hashes, one-click copy. Your data never leaves your device.
Random Password Generator
security
Generate strong random passwords instantly — free, no signup, 100% in your browser. Customize length & character types, batch generate up to 50. Strength meter with entropy analysis.
Temperature Converter — Celsius, Fahrenheit, Kelvin, Rankine
conversion
0 °C = 32 °F = 273.15 K = 491.67 °R. Convert Celsius, Fahrenheit, Kelvin & Rankine instantly — free, private, browser-based. Includes conversion formulas, step-by-step guides, and reference charts.
Unix Timestamp Converter
datetime
Convert Unix timestamps to dates instantly with our free epoch converter. Auto-detects seconds, milliseconds & microseconds. Live clock, bidirectional. No signup, 100% private.
UUID Generator & Decoder
security
Free UUID generator — create v1, v4, v5, v7 UUIDs instantly. Decode & validate any UUID. Batch generate up to 50. No signup, 100% browser-based.
Volume & Liquid Measurement Converter — 15 Units
conversion
1 liter = 0.2642 US gallons, 1 cup = 236.6 mL. Convert volume & liquid capacity between 15 units — metric, US customary, imperial & cooking measurements. Free online converter, 100% private, runs in your browser.
Weight Converter — kg, lbs, oz, g, Stone & 10 More Units
conversion
1 kg = 2.205 lbs · 1 oz = 28.35 g · 1 stone = 14 lbs. Convert weight between 13 units — metric, imperial & troy. Includes conversion tables, formulas & real-world references. Free, private, runs in your browser.
Browse by Category
Find tools organized by their function
Encoding & Formatting
2 toolsConvert and format data between different encodings and formats
Security Tools
3 toolsHash generators, encryption utilities, and security validation tools
Date & Time
1 toolUnix timestamp converters, timezone tools, and date formatters
Conversion Tools
6 toolsUnit converters, number system converters, and data transformation utilities
Text Processing
0 toolsText manipulation, string utilities, and content formatting tools
Latest from the Blog
Developer tutorials, guides, and insights
What Is a UUID? The Complete Guide to Format, Versions & Use Cases
Understand UUIDs from the ground up: 128-bit structure, hex format explained, how v1/v3/v4/v5/v7 work internally, collision math, real-world use cases, security pitfalls, and language-specific code examples.
Understanding Base64 Encoding: A Complete Guide
Learn how Base64 encoding works, when to use it, and common pitfalls to avoid in your development workflow.
Your Data Stays Private
All processing happens in your browser — nothing is sent to external servers. No tracking, no cookies, no data collection. Most tools even work offline.