Tagged “free-tool”
1,042 pages · most loved first · page 16 of 44
Hardware Test
A free, ad-free suite of browser-based tests for keyboards, styluses, displays, controllers, mice, and audio, with no do…
Harmopark
A browser-based music tool for visually building chords and progressions, useful for grasping harmony concepts or just p…
Have I Been Pwned
Troy Hunt's free service that checks whether your email address has appeared in known data breaches, aggregating billion…
hcker.news
A Hacker News reader that helps you follow stories and discussions, with filters to cut noise, including an option to hi…
Hearth
Free no-signup calculators for everyday pet and sleep questions, such as dog chocolate toxicity, dog age, and caffeine c…
Heavypaint
A raw digital painting app that runs in the browser, built to give brushwork a heavy, paint-like feel for quick sketches…
Heavyweight
A letter generator that produces professional-looking demand letters with style and a healthy dose of snootiness, ideal…
Height Comparison Chart
A 3D height comparison tool where you enter the heights of different people in centimeters or inches and see them stand…
Hero Patterns
A library of free, tileable SVG background patterns that designers can recolor and download directly as CSS backgrounds…
HeyWhatsThat
Computes what you can see from any point on Earth, drawing a panorama and a visibility map of the mountain summits in vi…
Higher Math Proficiency Test
A free, interactive 20-question quiz that evaluates the range of skills needed to tackle higher mathematics, handy for c…
Hiking Layering Planner
A free interactive planner that tells you exactly what to wear hiking, from base layer to shell, based on temperature, w…
Histogram Maker
A free online histogram generator where you paste data or import Excel or CSV, choose bins, add a normal curve and frequ…
Hndex
A full-text search engine for articles submitted to Hacker News, so you can search what the linked pages actually say ra…
HomeBrew HN
A personalized Hacker News reader that builds a profile of your interests and ranks posts to match, so your morning fron…
HotSymbol
A copy-and-paste library of special characters, with hearts, stars, arrows, and other symbols you can grab with one clic…
How Long to Read
A searchable database of reading times for millions of books, estimating how long a title will take at your own reading…
How Secure Is My Password?
A tool that estimates how long a computer would take to crack the password you type, a quick way to see what makes passw…
Howbigg
A display comparison tool that shows monitor, TV and phone sizes side by side, with exact dimensions, pixel density and…
HTML5 Piano
A browser piano that generates all of its audio on the fly with JavaScript and data URIs, with different sound styles, a…
HTTP Status Dogs
A lighthearted reference that pairs every HTTP status code with a matching photo of a dog, turning a dry spec into somet…
httpbin
A simple HTTP request and response testing service that echoes back headers, cookies, and payloads, useful for debugging…
hue.tools
A free toolbox for colors: mix and blend several colors, inspect their details, view matching combinations and find desi…
Huemint
An AI-driven color palette generator that produces harmonious brand, UI, or data-visualization palettes based on a chose…
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