Free Online Tools
Simple, fast and useful tools for everyday tasks. Count words, calculate percentages, convert units, format JSON and more - right in your browser.
50 free tools · no sign-up · runs in your browser
Popular tools
The tools people use the most.
Word Counter
Free word counter that counts words, characters, sentences, paragraphs and reading time as you type. Fast, private and free.
JSON Formatter
Free JSON formatter, validator and minifier. Pretty-print, compress and check JSON syntax instantly in your browser.
Age Calculator
Free age calculator that shows exact age in years, months and days from a date of birth. Also gives total days, weeks and hours.
Percentage Calculator
Free percentage calculator for "X% of Y", "X is what % of Y" and percent change. Fast, accurate and works offline in your browser.
Base64 Encoder & Decoder
Free Base64 encoder and decoder for text. Encode and decode UTF-8 strings instantly, right in your browser.
UUID Generator
Free UUID v4 generator. Create one or up to 100 unique identifiers with cryptographically-secure randomness, in your browser.
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Find the right tool for text, numbers, dates and development.
Latest guides
Practical, how-to articles for the tools people use most.
How to Write Prompts That Get Useful AI Answers
The anatomy of a prompt that works - role, task, context, format and constraints - why vague prompts produce generic answers, and how to iterate on output that misses.
21 Oct 2026How to Write Meta Titles and Descriptions That Get Clicked
The character limits Google actually enforces, how to write titles and descriptions for click-through rather than keywords, and the full set of tags a page needs at launch.
20 Oct 2026How to Use Placeholder Text in Designs and Mockups
Why placeholder text exists, how to size it to a layout, and the difference between classic Lorem Ipsum and realistic filler that makes a mockup actually testable.
Why SwiftTools?
Built for people who just want to get things done quickly.
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Every tool is free to use. We keep things simple and supported by ads, not paywalls.
Private by design
Your data stays in your browser. Tool input is processed locally and never uploaded to a server.
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No accounts, no email, no downloads. Open a tool and start working in seconds.
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Runs in any modern browser on desktop and mobile, online or offline.
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