All developer tools

Pretty print, minify, validate, and sort JSON online.

Validate JSON syntax instantly in your browser.

Decode JWT header and payload segments without verification.

Generate UUID v4 values in bulk.

Encode text to Base64 online.

Decode Base64 text online.

Convert Unix timestamps and ISO 8601 dates.

Test JavaScript regular expressions against sample text.

Beautify SQL for MySQL, PostgreSQL, and generic SQL.

Convert colors between HEX, RGB, and HSL.

Generate placeholder words, sentences, and paragraphs.

URL-encode text for query strings and paths.

Decode URL-encoded text online.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.

Convert JSON arrays to CSV with flattened nested objects.

Convert JSON to YAML with nested object support.

Compare two JSON documents side by side.

Calculate exact age in years, months, and days.

Calculate percentages, increases, decreases, and shares quickly.

Calculate body mass index from weight and height.

Count words, characters, sentences, and paragraphs.

Count characters with and without spaces.

Calculate days, weeks, months, and years between dates.

Estimate savings growth from deposits and interest.

Estimate monthly loan payments and total interest.

Calculate compound interest with a standard compounding formula.

Create a QR code image link for URLs and text.

Convert common length, weight, and temperature units.

Generate strong random passwords in your browser.

Convert text to uppercase, lowercase, title case, slug case, and camelCase.

Convert a time between common global time zones.

Calculate sale price and savings after a discount.

Calculate tip amount, total bill, and split per person.

Convert hourly, monthly, and annual pay estimates.

Estimate daily calories from body stats and activity.

Generate random numbers between a minimum and maximum.

Estimate trip fuel cost from distance, efficiency, and price.

Calculate weighted GPA from grade points and credits.

Calculate weighted course grade from scores and weights.

Estimate monthly mortgage payment before taxes and insurance.

Add or remove VAT from a price.

Estimate due date from the first day of the last period.

Estimate electricity cost from watts, hours, and price per kWh.

Count days until the next birthday.

Count weekdays between two dates.

Resize width or height while preserving aspect ratio.

Convert image dimensions to megapixels and estimated raw size.