Toolstud.io free web tools
This website contains a bunch of web-based tools (you don't need to install anything, just run them here) that I have developed through the years. Use them like you want (within reason) and if you really like them, let me know.
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Data tools
Bandwidth converter
Mbps ⇆ KB/s, GB/day, ...
Data size calculator
Calculate 10 Mbps x 6.5 hours = ? GB
Electrical power calculator
Calculate Volt x Ampere = Watt, kWh, Ah, Joule
Network tools
HTTPS readiness check
Is your site ready for Google's HTTPS everywhere policy?
Color tools
RGB color conversion
RGB color ⇆ CMYK, HSV, XYZ, Grayscale...
CMYK color conversion
CMYK color ⇆ RGB, HSV, XYZ, Grayscale...
HTML Color list
List of named HTML colors
Pantone Color list
List of named Pantone colors
Websafe Color list
List of websafe colors
Photo tools
Aspect ratio calculator
Image W x H → aspect ratio
Megapixel calculator
Image W x H → megapixels
Megapixel Aspect Comparison
See megapixel in different aspect ratios
DPI calculator
Print W x H and dpi → megapixels
Composition calculator
Focal length, subject distance, crop factor → image composition
Depth-of-Field calculator
Aperture, focal length, subject distance, crop factor → depth-of-field
Light calculator (EV)
Aperture, shutter time, ISO => Exposure Value
Video tools
Frame rate converter
Framerate conversion with ffmpeg and sox
Video bitrate calculator
Estimate video bitrate based on resolution, fps and bit depth
Common video bitrates
List of commong video bitrates
Video file size calculator
Estimate video file size from resolution and duration
Audio file size calculator
Estimate audio file size for uncompressed and compressed audio
DCP file size calculator
Calculate DCP audio and video filesizes
Music tools
Beats-per-minute
Convert BPM to beat, measure and song length
Tap your tempo
Tap to find the BPM
Web tools
HTML encoder
Encode text full of àççéñts
HTML char map
View all special HTML/Unicode characters
Calculator tools
Mortgage loan calculator
Calculate monthly payments for a mortgage loan
Fuel Cost calculator
How much $ does your car fuel cost per year?
Speed converter
Convert m/s into km/h, mph, mach
Distance calculator
Speed x time → distance
Gladwell's 10000 hour-rule
Deliberate practice according to Malcolm Gladwell
About tools
Examples of how to use the tools
Show me how I can use these tools
History & development
What? Who? Why? How?
Contact
Remarks about this site? Let me know!
Terms & Conditions
Terms & conditions, privacy statement
Donations/wishlist
How to show your appreciation
Development blog
Progress on the technical side