Free online tools for developers & writers
78 private, browser-based tools. No signup, no upload, no wait.
Business & Money Tools
8 toolsMarkup Calculator
Cost to selling price, markup and margin.
Discount Calculator
Sale price, savings and stacked discounts.
ROI Calculator
Return on investment and annualised ROI.
Break-Even Calculator
Units and revenue needed to cover costs.
Freelance Rate Calculator
Hourly and day rate from your target income.
Crypto Profit Calculator
Profit, loss and fees on any crypto trade.
VAT Calculator
Add or remove VAT at any rate.
Receipt Generator
Printable itemised receipts with tax.
AI Writing Tools
5 toolsDeveloper Tools
13 toolsJSON Formatter
Format, validate and beautify JSON.
Base64 Encoder
Encode & decode Base64 for text and images.
Regex Tester
Test regex live with plain-English explanations.
URL Encoder
Encode, decode and parse URLs.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512.
AI Token Counter
Count tokens and estimate API cost.
Hex to Decimal
Hexadecimal to decimal, binary and octal.
JSON to CSV Converter
JSON to CSV and CSV back to JSON.
Robots.txt Generator
Valid robots.txt with AI crawler blocks.
Schema Markup Generator
JSON-LD structured data for rich results.
CSV to Excel Converter
Paste CSV, download a real spreadsheet.
Email Signature Generator
HTML signatures for Gmail and Outlook.
Box Shadow Generator
Layered CSS box-shadow with live preview.
Text & Writing Tools
6 toolsWord Counter
Count words, characters and reading time.
Case Converter
UPPER, lower, camelCase, snake_case + more.
Markdown Editor
Live Markdown preview with export.
Text Diff Checker
Compare two texts side by side.
Lorem Ipsum
Generate placeholder text instantly.
Text Cleaner
Remove line breaks, duplicates and extra spaces.
Utility Tools
18 toolsPassword Generator
Strong random passwords, 100% client-side.
Color Picker
Convert HEX, RGB, HSL, CMYK and palettes.
QR Code Generator
Free QR codes for URLs, WiFi and more.
Meta Tag Generator
SEO meta, Open Graph and Twitter cards.
Tip Calculator
Tip, total and per-person split in seconds.
Morse Code Translator
Text to Morse code and back.
Binary Translator
Convert text to binary and binary to text.
Username Generator
Unique handles for gaming, social and work.
NATO Phonetic Alphabet
Spell words as Alfa, Bravo, Charlie.
Roman Numeral Converter
Numbers to Roman numerals and back.
Binary to Decimal
Binary, decimal, octal and hex in one place.
UUID Generator
Bulk random v4 UUIDs / GUIDs.
ASCII Art Generator
Turn text into big ASCII banners.
Aspect Ratio Calculator
Resize images and video without distortion.
Military Time Converter
24-hour time to AM/PM and back, with chart.
YouTube Thumbnail Downloader
Grab any YouTube thumbnail in HD.
Random Letter Generator
Random letters A–Z, vowels or consonants.
Fantasy Name Generator
Elf, dwarf, orc and dragon names in one click.
Text Style & Translator Tools
8 toolsSmall Text Generator
Tiny small caps, superscript and subscript text.
Cursive Text Generator
Cursive, bold script, gothic and outline styles.
Strikethrough Text
Cross out text, plus underline and overline.
Upside Down Text
Flip text 180° and mirror it instantly.
Zalgo Text Generator
Glitchy cursed text with adjustable corruption.
Wingdings Translator
Text to Wingdings symbols and back.
Braille Translator
English to grade 1 braille and back.
Invisible Character
Copy blank text for usernames and bios.
Games & Tests
6 toolsReaction Time Test
Measure your reflexes in milliseconds.
Click Speed Test
How many clicks per second can you hit?
Tally Counter
Click counter with multiple saved counters.
Memory Test
Visual memory span game — repeat the pattern.
Band Name Generator
Rock, metal, indie and punk band name ideas.
Rap Name Generator
Trap, drill and old school stage names.
More Text & Dev Tools
14 toolsSentence Counter
Count sentences, words and average length.
Syllable Counter
Syllables per word and line, with haiku check.
Text Repeater
Repeat any text up to 10,000 times.
Discord Font Generator
Fancy Unicode fonts for Discord names and bios.
JWT Decoder
Decode JWT header, payload and expiry locally.
YAML to JSON
Two-way YAML and JSON conversion.
CSS Grid Generator
Visual grid builder with CSS and Tailwind output.
Bubble Text Generator
Circled bubble letters for bios and usernames.
Mirror Text Generator
Flip and reverse text instantly.
Vaporwave Text
Fullwidth aesthetic text and sparkle frames.
Bionic Reading Converter
Bold word openings to skim faster.
Text to Handwriting
Render text as handwriting and download a PNG.
Cron Expression Generator
Build and read crontab schedules.
MAC Address Generator
Random valid MAC addresses in bulk.