Tools
Choose from date and time utilities, calculators, PDF tools, audio editors and browser recorders.
Date and time
- Date and time
Stopwatch
Measure elapsed time, record laps and splits, and export the results as CSV.
- Date and time
Timer
Set a countdown with quick presets and an alert when time runs out.
- Date and time
Date format converter
Show one date in common regional, compact, ordinal and Unix formats.
- Date and time
Age calculator
Calculate age on a chosen date and see the time until the next birthday.
- Date and time
Time duration
Find the duration between two clock times, including spans across midnight.
- Date and time
Quarter finder
Find the calendar quarter, half-year and quarter boundaries for any date.
- Date and time
Timestamp converter
Convert Unix timestamps and ISO dates in single or batch mode.
- Date and time
Time zone difference
Compare two time zones for a chosen local date and time.
- Date and time
Sleep calculator
Explore suggested bedtimes or wake-up times based on approximate sleep cycles.
Calculators
- Calculators
Grade calculator
Calculate a weighted grade and the score needed on a final exam.
- Calculators
GPA calculator
Calculate a credit-weighted GPA from letter grades or grade points.
- Calculators
Cooking converter
Convert cooking volumes, ingredient weights and temperatures.
- Calculators
Tournament calculator
Explore Swiss structures, records and modeled qualification chances for supported card games.
- Calculators
Random number generator
Generate one or more integers within a range, with optional uniqueness and sorting.
- PDF
Merge PDF
Combine two or more PDF files in the order you choose.
- PDF
PDF pages per sheet
Arrange several PDF pages on each output sheet for compact printing.
- PDF
PDF to grayscale
Convert PDF pages to grayscale with a selectable output resolution.
- PDF
PDF to text
Extract embedded text from PDF pages into a plain text file.
- PDF
Straighten PDF scan
Straighten scanned PDF pages automatically or with a manual angle.
- PDF
Sign PDF
Draw or import a visual signature and place it on one or more PDF pages.
Audio
- Audio
Voice recorder
Record microphone audio, pause when needed and download the result.
- Audio
Audio cutter
Keep or remove an audio selection, with fades and a ringtone preset.
- Audio
Audio merge
Join audio tracks in order and add optional fades or crossfades.
- Audio
Audio speed
Speed up or slow down an audio file while preserving its pitch.