31 tools · WebAssembly · 0 servers

Precision
Tools.
No server.
No waiting.

JSON, Base64, JWT, QR, palettes, glassmorphism, fluid typography, WCAG contrast, compound interest, payroll, DNS… Everything runs in your browser. No data leaves your machine.

Explore tools → Open JSON Formatter

formatmaster — metrics ▋

Processing ▌

Network latency 80 ms

WASM size 0 KB

Privacy ▌

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Local processing

Everything runs in the browser. WebAssembly for heavy operations, zero network latency.

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Strict privacy

No data leaves your machine. No logs, no telemetry, no invasive analytics.

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Free without limits

No rate limits, no subscriptions, no accounts. Every tool is always available.

The 20 Tools

Dev · Design · Finance · Sysadmin · Data — all in the browser

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JSON Formatter & Validator

Format, validate, minify and convert JSON

Open tool → /json

Base64 Encoder / Decoder

Encode and decode text, files and images

Open tool → /base64

JWT Decoder & Inspector

Decode header, payload, claims and expiry

Open tool → /jwt

Hash Generator — SHA-256, MD5, BLAKE3

SHA-256, SHA-512, SHA-1, MD5, BLAKE3

Open tool → /hash

Regex Tester & Debugger

Test regex patterns with real-time highlighting

Open tool → /regex

URL Encoder / Decoder

Percent-encoding and query string parser

Open tool → /urlcode

Color Palette Generator

Generate, extract and export CSS color palettes

Open tool → /palette

QR Code Generator — Free, No Watermark

High-density QR codes, export SVG & PNG

Open tool → /qr

Image Compressor — WebP, AVIF, JPEG

Compress images to WebP, AVIF, JPEG or PNG

Open tool → /imgz

Favicon Generator — Full Set + Manifest

Generate all favicon sizes from one SVG or PNG

Open tool → /favicon

Fluid Typography — CSS clamp() Generator

Responsive font sizes without media queries

Open tool → /fluid-type

WCAG Color Contrast Checker

AA/AAA contrast ratio for text and backgrounds

Open tool → /contrast

Glassmorphism CSS Generator

Frosted glass CSS effect with live preview

Open tool → /glassmorphism

CSS Box Shadow Generator

Multi-layer shadows, neon presets, live preview

Open tool → /box-shadow

〈s〉 Diseño

SVG Optimizer & Minifier

Clean, minify and optimize SVG vector files

Open tool → /svgopt

CSS to Tailwind Converter

Translate CSS properties to Tailwind utility classes

Open tool → /css-to-tailwind

CSS to JS / Styled Components

Convert CSS to camelCase JS objects or Styled Components

Open tool → /css-to-js

Mesh Gradient Generator

Interactive drag-and-drop abstract mesh gradients

Open tool → /mesh-gradient

Advanced CSV Mapper

Map, transform and join multiple CSV sources into one

Open tool → /csv-mapper

DNS Lookup Tool

Resolve A, AAAA, MX, TXT, CNAME records

Open tool → /dns