All Developer Tools
Browse our complete collection of free, fast online tools. All processing happens in your browser.
Browse by Category
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.