379 free tools that run on your device.

Compound interest, loans, mortgage, salary, investing and retirement calculators. Free, fast, private. Everything runs locally in your browser.

• Compound Interest Calculator
• Loan Calculator (EMI)
• Mortgage Payment Calculator
• Simple Interest Calculator
• Future Value Calculator

Math, algebra, geometry, unit conversion, physics and engineering calculators. Scientific calculator, fractions, equations, Ohm's law and 50+ tools that run locally.

• Scientific Calculator
• Fraction Calculator
• Ratio & Proportion Solver
• Exponent & Root Calculator
• Logarithm Calculator

World clock, time-zone converter, age calculator, business days, Unix timestamps, countdowns, Pomodoro andHIIT timers. Precise, offline-capable, free.

• World Clock
• Time Zone Converter
• Meeting Planner
• Days Between Dates
• Age Calculator

JPG/PNG/WebP/AVIF converter, compressor, resizer, cropper and editor. Batch + ZIP. Your images never leave your device.

• JPG → PNG
• PNG → JPG
• JPG → WebP
• PNG → WebP
• WebP → JPG

Merge, split, rotate, extract pages, images-to-PDF, PDF metadata and page counter. Files never uploaded — processed with pdf-lib in your browser.

• Merge PDF
• Split PDF
• Rotate Pages
• Delete / Extract Pages
• Reorder Pages

QR (URL, Wi-Fi, vCard), barcodes, secure passwords with WebCrypto, UUIDs, hashes, lorem ipsum and fake data. 100% local, nothing logged.

• QR: URL / Text
• QR: Wi-Fi
• QR: vCard Contact
• QR: Email / SMS / Phone
• QR: Calendar Event

Word/character/sentence counters, case converters, cleaners, sorters, diff, JSON/XML formatters. Handles 100k words without freezing (Workers).

• Word Counter
• Character Counter
• Reading / Speaking Time
• UPPERCASE / lowercase
• camel/Pascal/snake/kebab

HEX/RGB/HSL/CMYK converters, WCAG contrast checker, palette and gradient generators, shadows, glassmorphism, grid and flexbox builders with one-click CSS export.

• Color Picker + Converter
• HEX ⇄ RGB
• RGB ⇄ HSL
• CMYK Converter
• WCAG Contrast Checker

Base64/URL/HTML codecs, JSON formatter & validator, SHA/MD5 via SubtleCrypto, JWT decoder, UUID, regex tester, CIDR/subnet and formatters. Dev data never leaves the tab.

• Base64 Encode / Decode
• URL Encode / Decode
• HTML Entity Encode/Decode
• JWT Decoder
• JWT Signer (HS256)

Scientific calculator, fractions, linear & quadratic solvers with deterministic step-by-step, derivatives, matrices, probability, geometry. No AI needed.

• Scientific Calculator
• Fractions with Steps
• Percentages
• Linear Equations
• Quadratic with Steps

Audio trimmer/cutter, tape-style speed, WAV + Opus/WebM export via MediaRecorder, volume normalize, fade in/out, silence trim, waveform viewer. Files stay local.

• Audio Trimmer / Cutter
• Fade In / Fade Out
• Volume Normalizer
• Silence Trimmer
• Mono ⇄ Stereo

Real WebM segment + mute export via MediaRecorder, native frame extractor (canvas), contact sheets, metadata inspector, exact desktop-ffmpeg recipes where browsers fall short.

• Video Trimmer
• Frame Extractor
• Screenshot from Video
• Video → GIF
• MP4 Export

Meta/Open-Graph/Twitter, robots.txt, sitemap, JSON-LD (FAQ, Article, Product…), hreflang, UTM, SERP preview, HTML/CSS/JS minifiers. All generated locally.

• Meta Tag Generator
• Open Graph Generator
• Twitter Card Generator
• robots.txt Generator
• Sitemap Generator

Random numbers, decision wheel, yes/no, coin, dice, card picker, team/group generators, password and username makers. Fair, local, fun.

• Random Integer
• Random Decimal
• Random String
• Random Date
• Random Color