The all-in-one toolbox
built for speed.
Premium online tools for developers and everyday users. No login, no uploads: your data never leaves your device.
Browse tools by category
A growing collection of fast, focused, privacy-first utilities.
Developer Tools
JSON, Base64, hashes, JWT, UUIDs and more.
PDF Tools
Merge, split, compress and convert PDFs.
Image Tools
Compress, resize and convert image formats.
Utilities
QR codes, color, and unit conversions.
Text Tools
Compare, count, format, and transform text.
Encoding Tools
Encode and decode URL, HTML, and more.
Generators
Passwords, lorem ipsum, random data.
Time & Date
Timestamps, timezones, and converters.
SEO Tools
Robots.txt, sitemaps, canonical URLs, meta robots, CSP and redirect-rule generators.
Finance Tools
Loans, interest and financial calculators.
Video Tools
Video compression and conversion.
Audio Tools
Audio compression and conversion.
Electronics & Embedded
Ohm’s law, 555, ADC, PWM, motor FLC, conduit fill.
Featured tools
Conduit Fill Calculator
NEC Chapter 9 conduit-fill calculator. Pick conduit type and trade size, add cables (THHN/THWN/XHHW by AWG), and get utilisation, NEC limit, and pass/fail.
UPS Runtime Calculator
Estimate UPS / battery-backup runtime from battery voltage, capacity, series / parallel arrangement, load wattage, inverter efficiency, and depth of discharge. Includes a Peukert warning at high discharge rates.
Cable Tray Fill Calculator
NEC 392.22 cable tray fill check for ladder, ventilated, and solid-bottom trays. Sums cable areas / diameters and reports pass/fail with the right rule citation.
Power Factor Correction Calculator
Compute kVAR and capacitance per phase needed to raise an installation from its current power factor to a target. Before/after power-triangle diagram and current-reduction estimate.
Ohm’s Law Calculator
Solve Ohm’s law for voltage, current, resistance, or power. Enter any two of V, I, R, and P and instantly get the other two with step-by-step derivations.
JSON Formatter & Validator
Format, validate, and beautify JSON data instantly in your browser
PDF Merge & Split
Merge multiple PDFs into one or split a PDF by pages. All processing runs in your browser.
Image Compressor
Reduce image file size with quality and dimension controls. all in your browser.
Built for speed, designed for trust
Six promises we keep on every tool we ship.
Lightning fast
Most tools run client-side using Web APIs and WASM. No round-trips on local work, no waiting.
Privacy first
Your files never leave your browser. No uploads, no server-side logs.
No registration
Just open a tool and use it. No account, no email, no friction.
Works everywhere
Modern browsers, mobile devices, even offline once loaded.
Premium quality
Every tool is thoughtfully designed with sensible defaults and smart shortcuts.
Always free
100% free, forever. Just open and go.