Free Online Tools for Writers, Developers, and Creators
Count words, format JSON, generate passwords, convert colors, and much more. All tools run in your browser - fast, private, and completely free.
Popular Tools
View all →Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time instantly.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, and more.
Readability Score
Analyze text readability with Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog Index.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to text.
Password Generator
Generate strong, secure random passwords with customizable options.
Diff Checker
Compare two texts and highlight added, removed, and unchanged lines instantly.
JWT Decoder
Decode and inspect JWT tokens instantly in your browser. No data is sent to any server.
Image to Base64
Convert any image to a Base64 data URL instantly in your browser. No upload, fully private.
URL Parser
Break down any URL into its components: protocol, hostname, path, query parameters, and hash.
Unit Converter
Convert between units of length, weight, temperature, volume, speed, area, and data storage.
Color Picker
Pick colors visually and get HEX, RGB, and HSL values with a palette generator.
Color Palette Generator
Generate harmonious color palettes from any base color. Complementary, triadic, analogous, and more.
Color Contrast Checker
Check WCAG AA and AAA contrast ratios between two colors to ensure your design meets accessibility standards.
QR Code Generator
Generate QR codes from text, URLs, or any data - downloadable as PNG.
Percentage Calculator
Calculate percentages three ways: find X% of a number, what percent X is of Y, or the percentage change between two values.
Age Calculator
Calculate your exact age in years, months, and days. See total days lived and days until your next birthday.
Text to Speech
Convert text to audio using your browser's built-in speech engine. Choose voice, speed, and pitch.
Meta Tag Generator
Generate perfect HTML meta tags for SEO, Open Graph, and Twitter Cards in seconds.
Open Graph Preview
Preview how your page looks when shared on Facebook, Twitter, LinkedIn, and Discord.
Browse by Category
200+ tools organized across 6 categories
Writing Tools
27 tools
Word counter, case converter, text cleaner, and more writing utilities.
Developer Tools
55 tools
JSON formatter, Base64 encoder, regex tester, and code formatting tools.
Converter Tools
64 tools
Convert between data formats, units, number bases, and encodings.
Color Tools
14 tools
Pick colors, generate palettes, check contrast, and convert color formats.
SEO Tools
8 tools
Meta tag generator, SERP preview, schema markup, and keyword analysis.
Other Tools
32 tools
QR codes, calculators, validators, random generators, and more.
Why Choose BuildQuill?
BuildQuill is a collection of 200+ free online tools built for writers, developers, designers, and content creators. Every tool runs entirely in your browser, so your data stays private and never leaves your device.
Whether you need a word counter for your essay, a JSON formatter for your API response, a color palette generator for your design, or an SEO meta tag generator for your website, BuildQuill has you covered. No accounts, no subscriptions, no hidden limits.