Developer
QR Code Generator
Create a QR code for a link, text, email or Wi-Fi network.
Open the toolBlog
Guides and release notes
Every tool page also acts as its own guide: what it does, how the maths works, where the formulas come from and what the results mean. Everything here is written and maintained by the Tools.ly Team, and new tools are added as they are finished.
Image, audio & video
Image Resizer
Resize and crop images to exact pixel dimensions in-browser.
Open the tool Image, audio & video
Image Compressor
Shrink JPEG, PNG and WebP files without uploading them.
Open the tool Health & fitness
BMI Calculator
Body mass index with the WHO bands and their limitations.
Open the tool Privacy & security
Password Strength Checker
See how long a password would resist guessing, and why.
Open the tool Privacy & security
Random Number Generator
Unbiased random numbers, dice rolls and lottery draws.
Open the tool Developer
JSON Formatter & Validator
Pretty-print, minify and locate the exact error in broken JSON.
Open the tool Developer
Hash Generator
SHA-1, SHA-256, SHA-384 and SHA-512 checksums via Web Crypto.
Open the tool Date & time
Stopwatch
Start, stop and record laps with millisecond precision.
Open the tool Date & time
Countdown Timer
A precise countdown with a visible progress ring.
Open the tool Date & time
Age Calculator
Your exact age in years, months, days and heartbeats.
Open the tool Date & time
Date Difference Calculator
Days, weeks, months and working days between two dates.
Open the tool Developer
URL Encoder / Decoder
Percent-encode URLs and query strings, and read them back.
Open the tool Text & writing
Lorem Ipsum Generator
Placeholder text by paragraph, sentence or word count.
Open the tool Developer
Base64 Encoder / Decoder
Encode and decode text or files, entirely in the browser.
Open the tool Text & writing
Remove Duplicate Lines
Deduplicate and sort lists, with counts of what was removed.
Open the tool Text & writing
Text Case Converter
UPPER, lower, Title, Sentence and camelCase in one click.
Open the tool Converters
Unit Converter
Length, mass, volume, area, speed, temperature and data sizes.
Open the tool Calculators
Percentage Calculator
Percentages, increases, decreases and discounts, explained.
Open the tool Text & writing
Word & Character Counter
Words, characters, sentences and reading time as you type.
Open the tool Image, audio & video
Online Voice Recorder
Record audio with your microphone, see the waveform and download the file.
Open the tool Calculators
Scientific Calculator
Full scientific calculator with trigonometry, powers, roots and memory.
Open the tool Just for fun
Robo-Friend Game
A tiny interactive robot that reacts, plays mini-games and levels up.
Open the tool Color & design
Font Viewer
Preview any font with your own text, size, weight and colors.
Open the tool Color & design
Color Picker & Palette Studio
Pick colors, build palettes and copy ready-to-use CSS variables.
Open the tool Text & writing
Secure Quick Notepad
A private notepad that keeps your notes in your own browser only.
Open the tool Privacy & security
Strong Password Generator
Generate strong random passwords locally, with a live strength meter.
Open the tool Health & fitness
Mediterranean Calorie Tracker
Estimate daily calories from typical Mediterranean foods and portions.
Open the tool Health & fitness
Find Your Perfect Fit: Use Our Ideal Weight Calculator to Know Your Healthy Weight Range
Estimate a healthy weight range from your height, frame and age.
Open the toolLooking for something that is not published yet? The full directory shows the tools that are queued next.