Free tools · nothing is uploaded
Free online tools
33 browser tools for writing, code, dates, and units. Open any card to use that tool. Nothing you type is uploaded.
SERP preview
See an approximate desktop or mobile snippet for a title and meta description.
Word counter
Count words, characters, sentences, paragraphs, and an approximate reading time.
Readability
Estimate a Flesch reading ease score and grade. Syllables are approximate.
Case converter
Switch text to lowercase, uppercase, sentence case, or title case.
URL slug
Turn a title into a lowercase hyphenated path.
UTM builder
Add utm_source, utm_medium, and utm_campaign to a link.
URL encoder
Percent-encode a query value or a full URL, and decode it. A space becomes %20.
JSON formatter
Pretty-print and minify JSON, and show the error when the text is not valid JSON.
Base64
Encode UTF-8 text as Base64 and decode it. Base64 is not encryption.
Epoch converter
Convert Unix seconds or milliseconds to a date, and a date back to Unix time.
UUID generator
Generate random version 4 identifiers. They are IDs, not passwords.
Password generator
Make a random password from letters, digits, and a fixed symbol set.
Percentage calculator
Find a percent of a number, what percent one number is of another, and the change between two numbers.
Lorem ipsum
Generate placeholder paragraphs, sentences, or words. It is not an article to publish.
Hex to RGB
Convert #RRGGBB and red, green, and blue values from 0 to 255.
HTML encoder
Escape <, >, &, quotes, and apostrophes as HTML entities, and decode them.
SHA-256
Compute the SHA-256 checksum of text. It is not encryption and not a password hash.
Celsius to Fahrenheit
Convert both ways. 0°C is 32°F and 100°C is 212°F.
Tip calculator
Work out the tip, the total, and the share per person. Tax is not added.
Days between dates
Count calendar days from one date to another. January 1 to January 2 is 1 day.
Loan calculator
Work out a fixed monthly payment. Taxes and fees are not added.
Compound interest
Compound a starting amount yearly or monthly. 1000 at 5% yearly for 10 years is 1628.89.
Inches to cm
Convert inches and centimeters. 1 inch is 2.54 centimeters.
Roman numerals
Convert numbers and Roman numerals from 1 to 3999. 2026 is MMXXVI.
PX to REM
Convert pixels and rem. With a root of 16, 16px is 1rem. It does not read a stylesheet.
Binary to decimal
Convert binary, decimal, and hexadecimal up to 64 bits. 255 is 11111111 and FF.
Aspect ratio
Simplify a width and a height. 1920 by 1080 is 16:9. It does not change an image file.
Morse code
Translate text and Morse code. SOS is ... --- ... It does not transmit a signal.
Contrast checker
Check the WCAG 2 contrast of two colors. Black on white is 21:1.
Sales tax calculator
Add a percent to a price. 100 at 8% is a tax of 8 and a total of 108. It does not look up a rate.
Pounds to kilograms
Convert both ways. 1 pound is exactly 0.45359237 kilograms, shown as 0.454.
Miles to kilometers
Convert both ways. 1 mile is exactly 1.609344 kilometers, shown as 1.609.
Age calculator
Count years, months, days, and the next birthday. It is a calendar count, not a legal age.