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A growing library of fast, focused web utilities — free to use, no account required, and built to stay out of your way.
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Fast, focused utilities built for real workflows — no fluff, no sign-ups, no limits.
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Developers, designers, and creators rely on our tools every month.
256K+
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Calculations and conversions run directly in your browser — fast and private.
2300+
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A growing library covering text, code, math, images, and more.
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Everything runs client-side. Your inputs never leave your browser.
Fresh additions
Recently Added
The latest tools added to our collection
Solution Dilution Calculator
Solve dilution problems using C1V1 = C2V2 for preparing solutions from stock concentrations.
Serial Dilution Calculator
Plan serial dilution steps from stock concentration and dilution factor for lab protocols.
Savings Goal Calculator
Plan monthly savings needed to reach a financial goal by a target date with optional interest.
Runout Calculator
Check circular runout tolerance for rotating parts using indicator readings and specification limits.
Road Grade Calculator
Calculate road grade percent from rise and run or elevation change for civil engineering design.
Quarts to Gallons Converter
Convert quarts to gallons and gallons to quarts with US liquid volume precision.
Puzzle Generator
Generate printable logic puzzles and brain teasers with customizable difficulty and layout options.
Paycheck Calculator
Estimate take-home pay after federal, state, and FICA withholding from gross wages and filing status.
Paint Calculator
Estimate paint quantity from room dimensions, coats, and coverage rate for interior painting projects.
Operating Cash Flow Calculator
Calculate operating cash flow from net income and working capital changes to assess cash generation.
LCR Calculator
Estimate liquidity coverage ratio from high-quality liquid assets and net cash outflows for banking metrics.
EPS Calculator
Calculate earnings per share from net income and outstanding shares for financial statement analysis.
Concentricity Calculator
Evaluate concentricity tolerance between cylindrical features for machining and quality inspection.
Average Daily Rate Calculator
Compute average daily rate from room revenue and occupied rooms for hospitality revenue analysis.
Activated Sludge SVI Calculator
Calculate sludge volume index (SVI) for activated sludge processes in wastewater treatment operations.
Stopping Sight Distance Calculator
Estimate stopping sight distance from speed, reaction time, and deceleration for road design.
Time and a Half Calculator
Calculate overtime pay at time-and-a-half from your hourly wage and overtime hours worked.
URL Decoder
Decode percent-encoded URL strings back to readable text for query parameters and special characters.
Work Hours Calculator
Calculate total hours worked from start and end times with break deductions. Sum daily hours for payroll and timesheets.
XML to JSON Converter
Convert XML documents to clean JSON in your browser. Preserves elements, attributes, and text nodes with instant preview.
SAML Assertion Inspector
Paste a SAML assertion XML and read issuer, subject, audience, session times, and attribute statements.
Ruby Hash to JSON
Parse Ruby hash literals and symbol-key hashes into valid JSON for APIs and debugging.
RSA Sign Verify
Sign UTF-8 text with an RSA private key PEM and verify PKCS#1 v1.5 signatures with the matching public key.
ROT47 Cipher
Encode or decode text with the ROT47 cipher in your browser. Reversible ASCII obfuscation for visible characters.
Explore the library
Browse by Category
44 categories — pick one to explore its tools
Agriculture & Horticulture
39 tools
ASCII Tools
26 tools
Audio & Video Tools
30 tools
Biology
21 tools
Color Tools
43 tools
Construction & Real Estate
164 tools
Data Conversion
86 tools
Developer Tools
289 tools
Education Tools
17 tools
Electrical & Electronics
35 tools
Encoding & Encryption
80 tools
Engineering Fluid Mechanics
55 tools
Environment Sustainability
38 tools
Finance Calculators
527 tools
Food Cooking
87 tools
Fractal Generators
45 tools
Gaming Tools
33 tools
Health & Fitness
375 tools
Image Manipulation
134 tools
Lifestyle Entertainment
49 tools
List Tools
46 tools
Manufacturing & Machining
23 tools
Math Calculators
443 tools
Miscellaneous tools
1645 tools
Name Generators
11 tools
Network Tools
25 tools
Numerology & Esoteric
18 tools
Paycheck Calculators
70 tools
PDF & Document Tools
5 tools
Physics & Chemistry
170 tools
QR & Barcode Tools
6 tools
Random Generators
59 tools
Real Estate Finance
50 tools
Social Media Tools
33 tools
Statistics & Data Analysis
131 tools
Text Editors & Viewers
6 tools
Text Processing
101 tools
Time & Date
159 tools
Travel & Automotive
50 tools
Unicode Tools
43 tools
Unit Converters
180 tools
Utilities
47 tools
Weather & Environment
6 tools
Web & SEO Tools
27 tools
No categories match your search.
On the roadmap
Coming Soon
New mini-tools we're building next.
Html to Jsx
Convert HTML file to JSX online
Instagram Reel Downloader
Download and save Instagram videos locally with our Instagram Reel Downloader. No signup required.
Angular Velocity Calculator
Calculate angular velocity from angle, time, linear speed, and radius with unit conversions between rad/s and RPM.
Always free
No subscriptions, credits, or paywalls. Every tool on the site is free to use.
Privacy first
Processing happens client-side whenever possible. Your data never leaves your browser.
Organized by category
Browse by topic or search instantly. Find the right utility in seconds.
From the blog
Latest Blog Posts
Tips, guides, and insights from our team
Why AI Should Not Be Used for Finance Tools
Why generative AI fails at financial math: hallucinated numbers, non-deterministic calculations, lack of audit trails, and why deterministic tools matter.
How to Download a Website Favicon (Free Online Method)
Download any website's favicon in PNG or ICO format. Step-by-step guide for developers and designers using a free favicon downloader.
JWT Token Decoding Explained: How to Read JWT Payloads Safely
Learn how JWT tokens work, what header and payload contain, and how to decode JWT online without exposing secrets. Free JWT decoder guide.
How to Take a Screenshot in Your Browser (Free Tool Guide)
Capture full pages or visible areas in your browser without extensions. Step-by-step guide to our free online screenshot tool.
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