Every tool you need.
One tab, no fuss.
Free utilities for developers and curious humans - formatters, generators, encoders, security helpers. Most run in your browser; the few that need a server (DNS, WHOIS, OCR, conversions) process data in memory and discard it. No accounts, no signup, no nonsense.
Featured tools
316 tools from our most-used - pick one and go.
Pwned Password Check
Check whether your password has leaked - without ever sending it anywhere.
QR Code Generator
Build QR codes with custom colors, brand icons, and a caption baked in.
JSON formatter
Format, minify and validate JSON with exact line and column on error. Plus stats: nesting depth, key count, breakdown by type.
Cron expression builder
Type a cron expression, get a plain-English description and the next 10 fire times in your local timezone. Presets for GitHub Actions, Kubernetes CronJob and classic Linux cron.
Regex tester
Paste a regex and a string, see matches highlighted live. With a token-by-token explanation of the pattern and a list of flags (g, i, m, s, u, y).
BMI Calculator
Check your BMI against the WHO healthy weight range in seconds.
Loan calculator
Get your monthly payment (EMI), total interest, and full amortization schedule in seconds.
Color Converter
Convert HEX to RGB, HSL, OKLCH, Lab, CMYK. Every format live, side by side.
CSS box-shadow Generator
Build CSS shadows visually: stacked layers, sliders, Material and neumorphism presets. Ready-to-copy box-shadow, live preview, runs in the browser.
DNS Lookup
Check a domain's DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA, CAA), see propagation across 8 public resolvers and surface the server's ASN/ISP, no terminal required.
README Builder
Tagline
Meta tags suite generator
Build the full meta block (Basic, OG, Twitter Card, Article) with char counters and 4 live previews: Google, Facebook, X, LinkedIn.
Image Compressor
Shrink images 5-10x with no visible quality loss. Side-by-side preview built in.
Unit converter
Convert length, weight, temperature, volume, speed, pressure, energy and power between metric and imperial. Exact formulas, works offline.
JWT decoder
Paste a JWT, see the decoded header, payload and signature. Readable claims view (iss, sub, exp, iat), expired-token detection, no data sent.
Favicon generator (full pack)
Upload one image, get a complete favicon pack: 16, 32, 48, 64, 180, 192, 512 px plus a PWA manifest and ready HTML tags to paste in head.
Browse by category
Pick a topic and see every tool in one place.
Encrypted notes
Send a secret message that self-destructs after one read. The encryption key never leaves your browser.
QR codes
QR code generators: link, Wi-Fi, vCard, email, SMS, text.
Passwords and auth
Password generator, breach check, hash, bcrypt, PIN, TOTP, JWT decoder.
Colors
HEX/RGB/HSL/OKLCH converter, mixers, palettes, contrast, color-blindness, gradients.
Loans & credit
Loan, refinance, mortgage, debt payoff and credit card payoff calculators.
JSON & schemas
JSON formatter, JSON↔YAML↔TOML, JSONPath, JSON Schema, JSON→TypeScript, XLSX→JSON.
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