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Calculators, converters, text utilities, image tools, and developer utilities that run entirely in your browser — no sign-up, no waiting on a server, no data leaving your device.
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Percentage Calculator
Find a percentage of a number, work out what percent one value is of another, or calculate percentage change.
Open toolBMI Calculator
Calculate your Body Mass Index using metric or imperial units.
Open toolImage Compressor
Shrink image file size in your browser without uploading it anywhere.
Open toolQR Code Generator
Turn any link or text into a downloadable QR code.
Open toolTrending this week
BMI Calculator
Calculate your Body Mass Index using metric or imperial units.
Open toolWord Counter
Count words, sentences, paragraphs, and estimated reading time as you type.
Open toolPassword Generator
Generate strong, random passwords with a live strength meter.
Open toolMost popular
Percentage Calculator
Find a percentage of a number, work out what percent one value is of another, or calculate percentage change.
BMI Calculator
Calculate your Body Mass Index using metric or imperial units.
Image Compressor
Shrink image file size in your browser without uploading it anywhere.
Loan EMI Calculator
Calculate your monthly loan payment (EMI), total interest, and total repayment.
Recently added
Markdown Previewer
Write Markdown and see a live-rendered HTML preview side by side.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Hash Generator (SHA-256 & More)
Generate SHA-1, SHA-256, SHA-384, or SHA-512 hashes of any text.
UUID Generator
Generate one or many random UUID v4 identifiers.
All 50 tools
View all →Percentage Calculator
Find a percentage of a number, work out what percent one value is of another, or calculate percentage change.
Open toolAge Calculator
Calculate exact age in years, months, and days between two dates.
Open toolBMI Calculator
Calculate your Body Mass Index using metric or imperial units.
Open toolWord Counter
Count words, sentences, paragraphs, and estimated reading time as you type.
Open toolCharacter Counter
Count characters with and without spaces, and check against common platform limits.
Open toolImage Compressor
Shrink image file size in your browser without uploading it anywhere.
Open toolImage Resizer
Resize an image to exact pixel dimensions, with optional aspect-ratio lock.
Open toolPassword Generator
Generate strong, random passwords with a live strength meter.
Open toolQR Code Generator
Turn any link or text into a downloadable QR code.
Open toolLatest articles
View all →Understanding Compound Interest (And Why It's Called the Eighth Wonder)
How compound interest actually works, a worked savings example, and what to look for in a high-yield savings account.
Read article →Best Image Compression Methods for the Web (Without Losing Quality)
How lossy and lossless compression differ, which image formats to pick for photos vs. graphics, and a practical workflow for shrinking files before you upload.
Read article →How Percentages Work: A Refresher You Can Actually Use
The three most common percentage calculations explained with real examples — percentage of a number, percentage of total, and percentage change.
Read article →Get new tools in your inbox
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Frequently asked questions
- Are ToolsPunk tools really free?
- Yes — every tool on ToolsPunk is free to use, with no account, subscription, or usage limit. The site is supported by unobtrusive advertising rather than paywalls.
- Do I need to create an account?
- No account is needed for any tool. Favorites and recently viewed tools are saved locally in your browser instead, so there's nothing to sign up for.
- Is my data sent to a server?
- Most tools — including every calculator, converter, and image tool — run entirely in your browser using JavaScript. Nothing you type or upload is sent anywhere unless a specific tool says otherwise.
- How often are new tools added?
- New tools are added regularly. Check the "Recently added" section on this page, or use the category pages, to see what's newest.