Free online calculators and tools
1328 free online tools in 13 topics: timer and stopwatch, EMI, loan and compound interest calculators, spin the wheel and flip a coin, a QR code generator, compress images and merge PDF, a word counter, percentage calculator, mic and webcam tests and public holidays 2026 worldwide. Everything runs right in your browser – free, no sign-up.
Popular tools
- Secret Santa generator
- Online Calculator
- Play Solitaire Online
- Online Timer
- Play sudoku online
- Periodic Table of Elements
- Play FreeCell Solitaire Online
- Snake game online
- Citation Generator
- Typing test
- Date Calculator
- Online Stopwatch
- kg to lbs converter
- mm to inches
- BMI calculator
- Scientific Calculator
- cm to inches converter
- QR Code Generator
- Flip a coin
- EMI calculator
- Time duration calculator
- Hours calculator
- Spin the Wheel Online
- Random number generator
Run by SaracAI in Frankfurt, Germany. Every formula cites its source and is tested automatically before it goes live. Editorial policy · About us
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- Convert HEIC to JPG
- Compress images
- Resize images
- Image converter
- Remove the Background from an Image
- Sticker Maker
- Sticker pack maker for several photos at once
- Images to PDF
- GIF to MP4 converter
- Passport photo cropper
- View and remove EXIF data
- Merge PDF files
- Compress PDF
- Merge and compress PDF files in one step
- Remove Password from PDF
- PDF to JPG Converter
- Convert PDF to DOCX
- Split PDF and extract pages
- Sign a PDF
- PDF to Text Converter
- Compress Video to a Target Size
- Convert video to GIF
- Trim and compress video in one pass
- MOV to MP4 converter
- MKV to MP4 converter
- WebM to MP4 converter
- Remove Audio from Video
- Convert video to MP3
- Trim Video Without Re-encoding
- MP3 cutter
- Ringtone maker
- Make audio louder
- Audio converter
- BPM finder for audio files
- Unzip files online and create ZIPs
- CSV to Excel Converter
- TXT to PDF Converter
Recently used
My Toolbox →Public holidays worldwide
- Public Holidays Germany 2026–2030: National & RegionalPublic holidays in Germany 2025–2030: every nationwide holiday listed with date and weekday, plus the regional holidays of each state, year by year.
- School holidays in Czechia – All Years & RegionsSchool holidays in Czechia by year and region: every holiday period with start and end date, duration, countdown and calendar file.
- Germany bridge days 2027: study of all 16 statesIn 2027, 4 of 9 nationwide German public holidays fall on a weekend. State ranking, best days to take off and free CSV data (CC BY 4.0).
- Public Holidays Worldwide – Every Country, 2026 and 2027Public holidays worldwide, country by country and region by region: every date with weekday, countdown, long weekends and a calendar download (.ics).
All tools by topic
Tax & Finance73 tools
Finance calculators: compound interest, loan and EMI calculators, plus German tax calculators (VAT, real estate transfer tax) with legal basis.
Work & Payroll35 tools
Calculators for work and pay: work hours and time cards, overtime, hourly wage to salary and more – free, fast and right in your browser.
Calendar & Time74 tools
Online timer, stopwatch, countdown, time and hours calculators, plus working days and public holidays 2026 for countries worldwide – free, no sign-up.
Words & Language3 tools
Word finder and word unscrambler: solve anagrams, make words from letters and search patterns with ? and * – over 80,000 English words, US and UK.
Random & Games132 tools
Spin the wheel with your own entries or templates, flip a coin, roll dice and generate random numbers – fair, free and right in your browser, no sign-up.
Files & Images129 tools
Create QR codes, compress and convert images, merge PDFs – all right in your browser. Your files never leave your device.
Text & Social Media Tools40 tools
Count characters and words, fancy fonts for Instagram, change text case, clean up text and generate strong passwords – fast, free and private.
Device Tests29 tools
Mic test, webcam test, keyboard tester, CPS test, typing speed test and a free screen recorder – right in your browser, nothing is uploaded, no sign-up.
Math & School334 tools
Free math calculators with steps: percentages, fractions, rule of three, GPA, equations and 300+ more school tools – type your numbers and see every step.
Money & Everyday250 tools
Discount, tip and bill-splitting calculators, electricity, fuel and EV charging costs – quick answers for everyday life.
Business & Marketing Tools67 tools
Margin and markup, break-even, ROAS, seller fees, UTM links and search result previews – free calculators and tools for online shops and marketers.
Checkers & Developer54 tools
Validate IBAN and EAN, format and check JSON, test regex, look up DNS, see your IP and screen resolution – fast checking tools right in your browser.
Family, Health & Culture108 tools
Due date, dog age, water intake, calendar converters (Hijri, Hebrew, Chinese), color palettes and contrast checker – helpful everyday tools, free.