About
Built for speed, privacy, and zero friction.
ToolStack is a free collection of 196+ online utilities — encoders, formatters, generators, converters, calculators, and more. Every tool runs entirely in your browser. No signup, no tracking, no uploads, no hidden cost.
Why ToolStack?
- Private by design. Your data never leaves your device. Files, text, and images are processed locally with WebAssembly and JavaScript.
- Fast. No round-trips. No spinners. Tools load and run instantly.
- Free, forever. No accounts, no paywalls, no upsells.
- Keyboard-friendly. Press ⌘K / Ctrl K from any tool to jump back to search.
- Open and inspectable. All processing happens client-side — open DevTools and see for yourself.
What's inside
196 tools across 19 categories — from JSON formatters and regex testers to PDF tools, image converters, color pickers, and password generators.
Code & FormatText & WritingImageAudioPDFDocument ViewersEncoders & DecodersCalculatorsCrypto & SecurityColorCSSTime & DateSEOSpreadsheetConvertersQR CodesProductivityRandomReferences
Get started
Browse all 196 tools or jump straight to a popular one.