All tools

Free percentage calculator.

Calculate your Body Mass Index (BMI) in metric or imperial units.

Calculate your loan EMI (equated monthly instalment), total interest, and total repayment.

Calculate exact age from a date of birth: years, months, days, and total days lived.

Calculate the sale price and money saved for any discount percentage.

Free tip calculator.

Free online unit converter for length, weight, temperature, volume, area, speed and digital storage.

Free GPA calculator.

Free sales tax calculator.

Format, validate, and minify JSON in your browser.

Encode text to Base64 or decode Base64 back to text, with full Unicode (UTF-8) support.

Encode text for safe use in URLs or decode percent-encoded strings back to readable text.

Generate random version 4 UUIDs individually or in bulk.

Generate SHA-256, SHA-1, and SHA-512 hashes from any text in your browser.

Free secure password generator.

Free QR code generator.

Free color converter and picker.

Combine several PDF files into a single document, in the order you choose, entirely in your browser.

Convert JPG and PNG images into a single PDF, one image per page, in the order you choose.

Compress JPG, PNG, and WebP images locally in your browser with an adjustable quality slider.

Resize images to exact pixel dimensions or by percentage, with optional aspect-ratio lock.

Convert an image to a Base64 data URI you can embed directly in HTML or CSS.

Free image cropper.

Free image format converter.

Count words, characters, sentences, and paragraphs as you type, with reading time and keyword density.

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.

Generate lorem ipsum placeholder text by paragraphs, sentences, or words.

Remove duplicate lines from a list, with options to trim, ignore case, and sort.

Turn a title into a clean, SEO-friendly URL slug: lowercase, hyphenated, accent-stripped, and free of special characters.

Free text diff tool.

Free character counter.

Project savings growth with compound interest and regular contributions.

Calculate simple interest and the total amount due from principal, rate, and time.

Find out how much to save each month to hit a savings goal by a target date, including optional interest.

Calculate return on investment (ROI) as a percentage, plus annualized ROI over a holding period.

Free mortgage calculator.

Free investment calculator.

Free salary calculator.

Estimate how many tokens your prompt uses for models like GPT and Claude, so you stay under context limits and control cost.

Check the readability of your writing with Flesch Reading Ease and grade-level scores.