Free online tools for developers and designers
Simple utilities for formatting JSON, generating CSS gradients, converting Base64, translating colors, testing regex, and converting timestamps.
Tool Directory
Clean, direct pages for everyday utility tasks.
Loan Calculator
Calculate monthly payments, total interest, and accelerated payoff scenarios.
Open toolROI Calculator
Measure ROI, net profit, and annualized returns for investment decisions.
Open toolSalary Calculator
Estimate monthly and yearly take-home pay after taxes and deductions.
Open toolExchange Rate Converter
Convert currencies with browser-fetched exchange rates and common pairs.
Open toolAI Prompt Generator
Turn a rough goal into a structured prompt for ChatGPT, Claude, or Midjourney.
Open toolRegex Tester
Evaluate regex patterns against test strings with immediate match highlighting.
Open toolJSON Formatter
Format, validate, minify, and inspect JSON with readable syntax output.
Open toolDiff Checker
Compare two text or code blocks line by line and inspect differences quickly.
Open toolSQL Formatter
Format SQL queries with readable indentation and uppercase keywords.
Open toolCron Generator
Create cron expressions visually for hourly, daily, weekly, and monthly jobs.
Open toolImage Compressor
Compress images in the browser with quality control and downloadable output.
Open toolColor Palette Generator
Generate a palette of coordinated tints and shades from one base color.
Open toolWord Counter
Count words, characters, sentences, paragraphs, and estimated reading time.
Open toolCSS Gradient Generator
Build linear or radial gradients with live preview and copy-ready CSS.
Open toolQR Code Generator
Generate downloadable QR codes for URLs, text, Wi-Fi strings, and contact info.
Open toolTime Zone Converter
Compare dates and times across major time zones for remote collaboration.
Open toolBase64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to plain text in one click.
Open toolMarkdown Editor
Write Markdown on one side and preview formatted output instantly.
Open toolPassword Generator
Generate secure passwords with custom length and character options.
Open toolTimestamp Converter
Convert current, human-readable, and Unix timestamps in both directions.
Open toolColor Converter
Convert HEX, RGB, and HSL values with a live swatch and synchronized inputs.
Open toolURL Encoder/Decoder
Encode unsafe URL characters or decode encoded URLs instantly.
Open toolJWT Decoder
Inspect JWT headers and payloads locally in the browser.
Open toolUUID Generator
Generate one or many UUID v4 identifiers instantly.
Open toolText Deduplicator
Remove duplicate lines from pasted text while keeping original order.
Open toolCase Converter
Convert text to uppercase, lowercase, title case, and sentence case.
Open toolHash Generator
Generate browser-side SHA hashes for text input.
Open toolUnit Converter
Convert common length, weight, and temperature values quickly.
Open toolHTML Escape
Escape or unescape HTML special characters safely.
Open toolDate Difference
Calculate days, weeks, and months between two dates.
Open toolFile Size Converter
Convert bytes, KB, MB, GB, and TB with binary or decimal units.
Open toolText Sorter
Sort multi-line text alphabetically, numerically, by length, or shuffle the list.
Open toolLorem Ipsum Generator
Generate filler paragraphs, sentences, or Chinese sample text for layouts, content blocks, and writing practice.
Open toolSpecial Character Copy
Browse common Unicode symbols and emoji, then copy any character with one click.
Open toolImage Format Converter
Convert uploaded images to PNG, JPG, or WebP locally in the browser.
Open toolImage Crop Resizer
Crop images to a centered area, resize to custom dimensions, and export the result.
Open toolSVG Editor Optimizer
Paste SVG code, preview it live, simplify markup, and export a cleaner version.
Open toolEyedropper Tool
Use the native EyeDropper API when available to sample colors from the screen.
Open toolCountdown Timer
Run a countdown timer or stopwatch in the browser for deadlines, study sessions, and meetings.
Open toolAge Calculator
Calculate exact age from a birth date and show the time until the next birthday.
Open toolBusiness Days Calculator
Count weekdays between two dates and optionally exclude custom holidays.
Open toolNumber Base Converter
Convert values between binary, octal, decimal, and hexadecimal formats.
Open toolCSV JSON Converter
Convert pasted CSV to JSON arrays and convert JSON arrays back into CSV.
Open toolList Formatter
Turn comma or line-separated values into JSON arrays, SQL IN lists, or quoted strings.
Open toolTip Split Calculator
Calculate total bill, tip amount, and how much each person should pay.
Open toolRandom Data Generator
Generate lightweight mock data for names, emails, phones, addresses, and UUIDs.
Open toolBox Shadow Generator
Tune offsets, blur, spread, opacity, and color to build copy-ready CSS shadows.
Open toolBorder Radius Generator
Generate standard or asymmetric border radius values with a live preview.
Open toolLayout Generator
Configure flexbox or grid properties visually and copy the generated layout CSS.
Open toolPX REM EM Converter
Convert pixel values into rem and em units using a custom root font size.
Open toolTable Markdown Converter
Convert tabular data between TSV-style text and Markdown table syntax.
Open toolPercentage Calculator
Solve common percent problems including X percent of Y and increase or decrease rates.
Open toolRoman Numeral Converter
Convert Arabic numbers to Roman numerals and parse Roman numerals back to numbers.
Open toolMorse Code Converter
Encode text into Morse code or binary and decode messages back into readable text.
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