40 fast, private, browser-based utilities. No signup. No upload. No tracking.
Beautify, minify and validate JSON instantly in your browser.
Encode text to Base64 or decode Base64 to text, instantly.
Percent-encode URLs or decode encoded URL strings.
Count words, characters, sentences and reading time live.
Generate secure random passwords with custom rules.
Convert colors between HEX, RGB and HSL formats.
Convert text to UPPER, lower, Title, Sentence, camelCase.
Generate placeholder text in paragraphs, sentences, or words.
Generate MD5, SHA-1 and SHA-256 hashes from any text.
Compare two texts side-by-side and see differences highlighted.
Create QR codes from text, URLs or any data — download as PNG.
Convert between units of length, weight, temperature and more.
Calculate percentages, percentage change and percentage of any number.
Calculate your exact age in years, months, days, hours and seconds.
Calculate Body Mass Index with metric and imperial unit support.
Calculate monthly payments, total interest and amortization schedule.
Test regular expressions with live highlighting and match extraction.
Convert between Unix timestamps and human-readable dates.
Convert Markdown to HTML with live preview and one-click copy.
Extract all email addresses from any text, deduplicate and sort.
Resize images in your browser with aspect ratio lock and download.
Minify or beautify CSS code. Reduce file size instantly.
Unscramble letters to find all possible words. Solve anagrams instantly.
Calculate tips and split bills between friends.
Set countdowns to any date — New Year, Christmas, events.
Precision stopwatch with lap times and millisecond accuracy.
Test how strong your password is with instant feedback.
Convert between binary, hex, decimal and octal instantly.
Calculate days, weeks, months and years between two dates.
Calculate monthly payments, total interest and amortization.
Convert times between any two zones with a live world clock.
Convert text to natural speech with adjustable voice, rate and pitch.
Convert pixels to rem units with adjustable root font size.
Generate random or theory-based palettes. Click to copy HEX.
Generate random numbers in any range or pick a winner from a list.
Measure download, upload speeds and ping in seconds.
Convert text to binary (0s and 1s) and back. ASCII translator.
Find your public IP and look up location, ISP, country of any IP.
Find city, state, country and coordinates for any ZIP/postal code.
Wrap or unwrap text to any line length. Re-flow paragraphs.
ToolNest brings together the most-used developer and productivity utilities in one fast, ad-supported site. Every tool here runs entirely client-side: that means your text, passwords and data never leave your browser. There is no server processing, no account required, and nothing stored.
Our JSON Formatter is the fastest way to validate and pretty-print API responses. The Base64 encoder and URL encoder are everyday essentials for developers. The Percentage Calculator handles percentage change, "what is X% of Y" and more. The BMI Calculator and Loan Calculator are perfect for health and finance calculations. Writers love the word counter for essays and tweets, while the password generator creates strong random passwords you can trust.
Speed: tools load instantly and run on your device. Privacy: nothing is sent anywhere. Cost: every tool is free. Bookmark this page — new tools are added regularly.
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