Category

Developer Tools

Format, validate, encode, decode, and generate data for daily development workflows. Use this browser-based tool for everyday work. It is designed for speed, privacy, and clear results.

What you can do here

Browse 35 tools in this category, including 35 interactive tools that run directly in the browser.

Daily developer workflows
Content and SEO checks
Private browser-side processing

Popular tools in Developer Tools

UUID v4 Generator ULID Generator HEX to RGB Converter RGB to HEX Converter Color Contrast Checker Timestamp Converter

Tools

UUID v4 Generator

Generate random RFC 4122 UUID v4 identifiers in the browser.

ULID Generator

Generate sortable ULID identifiers with timestamp prefixes.

HEX to RGB Converter

Convert HEX color values into RGB channel values.

RGB to HEX Converter

Convert RGB channel values into a HEX color.

Color Contrast Checker

Calculate WCAG contrast ratio between two colors.

Timestamp Converter

Convert Unix timestamps to ISO dates and ISO dates back to Unix seconds.

Length Converter

Convert common metric and imperial length units.

Weight Converter

Convert grams, kilograms, pounds, ounces, stones, and tons.

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin values.

Data Size Converter

Convert bits, bytes, decimal units, and binary data units.

Regex Tester

Test regular expressions and inspect matches, groups, and named groups.

Password Generator

Generate strong random passwords locally with selected character sets.

Random String Generator

Generate random strings for IDs, test data, and temporary tokens.

SHA-1 Generator

Generate SHA-1 hashes locally for checksums and legacy comparisons.

SHA-256 Generator

Generate SHA-256 hashes locally in your browser.

SHA-512 Generator

Generate SHA-512 hashes locally in your browser.

Percentage Calculator

Calculate what percentage one value is of another.

Percentage Change Calculator

Calculate percentage increase or decrease between two values.

Discount Calculator

Calculate discounted price from price and discount percentage.

Loan Payment Calculator

Estimate monthly loan payments from principal, rate, and term.

Compound Interest Calculator

Estimate compound growth over time with repeated compounding.

Number Base Converter

Convert integers between bases from binary to base 36.

Cron Expression Explainer

Explain basic five-field cron expressions in readable language.

CSS Clamp Generator

Generate responsive CSS clamp() values from pixel ranges.

Box Shadow Generator

Generate CSS box-shadow declarations with offsets, blur, spread, and color.

Border Radius Generator

Generate CSS border-radius shorthand values.

CSS Gradient Generator

Generate linear-gradient CSS strings from color stops.

WiFi QR Payload Generator

Generate the text payload used by WiFi QR codes.

vCard Payload Generator

Generate vCard text for contact QR codes.

QR Code Generator

Generate a QR code as SVG or PNG locally from URLs, text, WiFi payloads, or contact data.

QR Code Reader

Decode QR code images locally in the browser without uploading the file.

Mailto Link Builder

Build mailto links with subject, body, cc, and bcc parameters.

EAN-13 Validator

Validate EAN-13 barcode digits and checksum.

File Summary

Summarize file names, sizes, MIME types, and detected extensions.

Base64 Size Estimator

Estimate the encoded Base64 size for a file or byte count.