A simple online countdown timer.
Pick a random item from a list.
Generate a QR code from text or a URL.
Estimate growth from compound interest and regular contributions.
Calculate body mass index from metric or imperial measurements.
Format, validate and minify JSON.
A simple online stopwatch with laps.
A focus timer using the Pomodoro technique.
Compare local times and UTC offsets between time zones.
Calculate the number of years, months and days between two dates.
Calculate percentages quickly.
Find your monthly savings target and see a 50-year investing path.
Convert currencies using the latest available reference rates.
Create campaign links with UTM tracking parameters.
Estimate dog and cat ages in equivalent human years.
Split a list of names into random, balanced teams.
Generate a random number in a range.
Roll virtual dice, D4 to D100.
Generate strong, random passwords.
Count characters, words, and lines.
Convert text between cases.
Compare two lists and find shared or unique items.
Remove empty lines, duplicates, sort or reverse a list.
Convert text into a URL-friendly slug.
Compare two texts line by line.
Preview Markdown rendered as HTML live.
Generate random UUIDs.
Convert between Unix timestamps and dates.
Encode and decode Base64 text.
Encode and decode URL text and query values.
Generate SHA-256, SHA-384 and SHA-512 hashes.
Convert between a JSON array of objects and a CSV table.
Decode a JWT header and payload.
Test a regular expression against text.
Check a page's title, description, canonical and other meta tags.
Check a page's Open Graph and Twitter Card tags.
Check a domain's robots.txt rules and declared sitemaps.
Check a sitemap.xml file and count its URLs.
Run a one-page pre-launch checklist against a public URL.
Look up common DNS records for a domain name.
Calculate image and video aspect ratios.
Convert colors between HEX, RGB, HSL and more.
Generate a balanced light-to-dark color scale and CSS variables from one color.
Build a box-shadow declaration with a live preview.
Check WCAG color contrast between two colors.
Convert between px and rem based on a base font size.
Generate a CSS clamp() value for fluid typography.
Build a type scale and export CSS variables.
Build a CSS linear-gradient with multiple color stops.
Pick exact colors from an image and copy their values.
Crop an image to a custom or preset aspect ratio.
Add a text watermark to an image in your browser.
Join multiple images into one downloadable image.
Add a clean background, padding, rounded corners and shadow to a screenshot.
Create common favicon PNG sizes and an ICO file.
Resize an image by pixels or percentage.
Compress an image to JPEG or WebP.
Convert an image between PNG, JPEG and WebP.
Turn multiple images into a downloadable animated GIF.
Merge, split and convert images to PDF in your browser.
Check an image's width, height, ratio and file size.
Convert between decimal and binary file size units.
Design Drifter