All tools

Format, beautify and validate JSON with 2 or 4 space indentation.

Check whether a JSON document is valid and see exactly where it breaks.

Strip whitespace from JSON and see how many bytes you saved.

Decode the header and payload of a JSON Web Token and inspect its claims.

Generate cryptographically random v4 UUIDs in bulk.

Test regular expressions live with highlighted matches and capture groups.

Build and explain cron schedules in plain English.

Convert text to Base64 and back, with full Unicode support.

Percent-encode and decode URLs, query strings and components.

Escape and unescape HTML entities to display markup safely.

Convert Unix timestamps to human dates and back, in UTC and local time.

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text or files.

Format SQL queries with consistent keyword casing and indentation.

Pretty-print and validate XML documents with proper indentation.

Convert YAML to JSON and back, with syntax checking.

Compare two texts and see every added, removed and changed line highlighted.

Count words, characters, sentences and paragraphs as you type.

Count characters with live limits for tweets, meta tags and SMS.

Estimate how long an article takes to read or speak aloud.

Delete repeated lines from a list, with optional case-insensitive matching.

Sort text alphabetically, numerically, by length or at random.

Reverse text by character, by word or by line.

Convert text between upper, lower, title, camel, snake and kebab case.

Turn any title into a clean, URL-safe slug.

Generate placeholder paragraphs, sentences or words for mockups.

Clean up double spaces, trailing whitespace and blank lines.

Shrink JPG, PNG and WebP files without leaving your browser.

Resize images to exact dimensions or by percentage, offline.

Crop images to a selection or a fixed aspect ratio.

Convert between JPG, PNG and WebP directly in the browser.

Convert an image into a Base64 data URL for inline embedding.

Decode a Base64 string or data URL back into a downloadable image.

Pull the dominant colors out of any image as a usable palette.

Generate every favicon size from a single image, plus the HTML.

Combine several PDF files into one, in the order you choose.

Extract a page range from a PDF or split it into single pages.

Rotate all or selected pages of a PDF and save the result.

Turn JPG and PNG images into a single PDF document.

Design CSS box shadows visually, including layered and inset shadows.

Build linear, radial and conic gradients with unlimited color stops.

Craft rounded and organic shapes with per-corner border radius control.

Generate fluid typography and spacing with clamp() and viewport units.

Learn and generate flexbox layouts with every property visualised.

Compose CSS Grid layouts visually and export the code.

Convert between HEX, RGB, HSL, HSB and CMYK with a live preview.

Check text contrast against WCAG AA and AAA accessibility levels.

Work out percentages, shares and percentage change in one place.

Calculate loan EMI, total interest and a full amortisation schedule.

Add or remove GST at any rate and see the CGST/SGST split.

Project the maturity value of a monthly systematic investment plan.

See how an investment grows with compounding and regular contributions.

Find the sale price, the amount saved and the effective discount.

Convert between metres, feet, inches, miles and eleven other units.

Convert kilograms, pounds, ounces, stones and tonnes instantly.

Convert Celsius, Fahrenheit, Kelvin and Rankine.

Convert square metres, acres, hectares, square feet and more.

Convert km/h, mph, m/s, knots and mach.

Convert litres, gallons, cups, pints and cubic units.

Convert currencies offline using editable static reference rates.

Calculate exact age in years, months, days, hours and minutes.

Count the days, weeks and months between any two dates.

Count business days between dates, excluding weekends and holidays.

Convert a time across time zones with automatic DST handling.