Everyday tools,
zero friction
Single-purpose utilities that run in your browser. No sign-up required.
Tools
Reaction Tests
Measure your reaction speed with simple, choice, audio, and go/no-go tests. Track progress over time with charts and statistics.
Copy Page Text
The fastest way to copy all text from a webpage for notes, documents, or sharing with a single click.
Smart Text Cleaner
Remove extra spaces, fix line breaks, and clean formatting from any text instantly.
Word Case Swap
Convert text between UPPER, lower, Title Case and more with one click.
Character Counter
Count characters, words, sentences, paragraphs, and estimate reading time instantly.
JSON Formatter
Format, validate, and minify JSON with syntax highlighting and error detection.
Base64 Encoder
Encode and decode Base64 strings instantly. Supports Unicode text.
Word Frequency Analyzer
Extract unique words, count frequency, and filter out known words. Perfect for language learners to find new vocabulary in texts.
URL Encoder & Decoder
Encode and decode URLs instantly using encodeURIComponent. Supports both encode and decode modes with live output.
UUID Generator
Generate UUID v4 identifiers using the Web Crypto API. Copy instantly, keep a history of recent UUIDs.
Color Converter
Convert colors between HEX, RGB, and HSL formats. Pick with color picker or enter values manually.
Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports UTC, local time, ISO 8601, and relative time.
Text Diff Viewer
Compare two texts and highlight added and removed lines. LCS-based diff running entirely in your browser.
Noise Meter
Measure real-time sound levels in dB using your device microphone. Instantly see noise categories from quiet to very loud.
From the Blog
View all10 Hidden Characters That Break Your Copy-Paste
Invisible Unicode characters silently corrupt your text when you copy-paste. Learn which ones cause problems and how to remove them.
Why camelCase vs snake_case Matters in Code
Naming conventions affect readability, tooling, and team velocity. A practical guide to choosing the right case style for your project.
Average Reaction Time by Age: What's Normal?
Reaction time varies by age, sleep, and practice. See the benchmarks, learn what affects your speed, and test yourself.
Top 5 JSON Errors and How to Find Them Fast
Trailing commas, missing quotes, wrong encoding — the most common JSON mistakes that break APIs and configs. Learn how to spot and fix them instantly.
How to Measure Reaction Time Accurately
Three methods to measure reaction time — ruler drop, online tests, and lab experiments. Pros, cons, and tips for getting accurate results.
Why Counting Characters Matters: Twitter, SEO & SMS Limits
Character limits are everywhere — social media posts, meta titles, SMS messages, database fields. Learn the exact limits and how to stay within them.
Reaction Time vs Reflex: What Is the Difference?
Reaction time and reflexes are not the same thing. Learn the neuroscience behind each, see real-world examples, and find out which one you can actually train.
Frequently Asked Questions
Are these tools free?
Yes, all tools are completely free with no limits, no sign-up required.
Is my data safe?
Yes. All tools process your input locally in your browser — your data is never sent to our servers.
Do I need to create an account?
No. Just open any tool and start using it. No registration needed.
What browsers are supported?
All modern browsers — Chrome, Firefox, Safari, Edge. Tools work on both desktop and mobile.
Can I suggest a new tool?
Yes! We're always looking for useful utilities. Contact us with your ideas.
Got an idea for a tool?
We're always looking for useful utilities to build. If you have a suggestion, let us know.