Toolkk: Tools, Calculator, PDF

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In-app purchases

About this app

Toolkk is an all-in-one online toolbox with 1000+ free, practical tools. No installation — open and use instantly. Most tools run locally in your browser to protect your privacy. Whether you're a developer, designer, student or professional, Toolkk helps you calculate, convert, process and look things up — all in one place.

CALCULATE & CONVERT
Scientific calculator, percentage calculator, age calculator, loan & mortgage calculator, interest calculator, BMI, date duration, tax calculator; unit converter (length, weight, temperature, area, volume, speed, pressure), currency converter, base converter (binary/octal/decimal/hex), roman numerals and timestamp converter.

IMAGE TOOLS
Image compressor, image format converter (PNG/JPG/WebP/GIF/BMP), crop & resize, watermark, image stitching, image to PDF, Base64 image, color picker & color converter (HEX/RGB/HSL/CMYK), QR code reader.

PDF & DOCUMENTS
PDF converter, PDF compressor, image to PDF, merge & split PDF, Markdown preview & convert, rich text tools.

QR & BARCODE
QR code generator (URL/text/contact/WiFi), QR code reader, barcode generator, QR with logo.

DEVELOPER TOOLS
JSON formatter / validator / minifier, XML & YAML converter, Base64 encode/decode, URL encode/decode, Unicode encode/decode, regex tester, timestamp & date converter, hash generator (MD5/SHA1/SHA256), UUID generator, random string & number generator, Cron parser, JWT decoder, text diff, HTML escape.

SECURITY & ENCRYPTION
Password generator, encryption & decryption (AES/DES/RSA), hash checker, Base64, URL-safe encoding — keep your data and privacy safe.

TEXT TOOLS
Word & character counter, case converter, text dedupe, remove blank lines, sort lines, Markdown editor.

DATE & TIME
Date duration, countdown, world clock, timestamp converter, Cron expression.

FINANCE
Loan & mortgage, interest & compound interest, currency converter, tax and ROI calculators.

HEALTH & LIFE
BMI, body fat, BMR, due date, random picker & decision wheel.

WHO IT'S FOR
- At work: schedule with date/workday tools, handle files with document & PDF tools.
- Developers: JSON, Base64, regex, timestamp, hash, UUID — right at hand, no site-hopping.
- Students & teachers: scientific calculator, unit & base conversion, a study companion.
- Designers & creators: image compression & conversion, color tools, QR codes.
- Everyday: BMI, due date and handy life calculators.

WHY TOOLKK
- 1000+ tools, updated regularly
- Instant access — no download or sign-up to start
- Privacy-first: most tools process locally, nothing uploaded
- Sync across web, app and mini-program
- Free essentials with optional Pro upgrades

Put a pocket-sized Swiss-army toolbox in your phone and get things done faster. Got feedback? Tell us in the app — we keep refining every tool.

What’s new

• Added rewarded access: watch a short video to unlock selected premium or restricted tools for one use.
• Added daily rewards, including limited-time membership access and Toolkk Coins.
• Improved file downloads, system sharing, image saving, and export workflows.
• Enhanced the launch experience, tool lists, icon loading, and tool detail pages.
• Improved Google Sign-In, English localization, and multilingual privacy content.