Free tools · no account
Free online tools that run in your browser
QR codes, passwords, JSON, converters and calculators — no signup, no uploads, no waiting. Everything runs on your device.
All tools
QR Code Generator
Turn a link or any text into a downloadable PNG QR code. Static, never expires.
Open tool →Wi-Fi QR Code Generator
Let guests join your Wi-Fi by scanning a code. WPA/WPA2/WPA3, WEP and open networks.
Open tool →Password Generator
Strong random passwords with custom length and character sets, plus entropy in bits.
Open tool →Word Counter
Live word, character, sentence and paragraph counts with reading time.
Open tool →JSON Formatter
Format with 2-space indentation, minify or validate JSON — all locally.
Open tool →Base64 Encoder
Encode text to Base64 or decode it back, with UTF-8 and URL-safe support.
Open tool →Case Converter
Switch text between UPPER, lower, Title, Sentence, camelCase, snake_case and kebab-case.
Open tool →Unit Converter
Length, weight, volume, area, speed, storage and temperature in one place.
Open tool →Color Converter
HEX, RGB and HSL conversion plus contrast against white and black.
Open tool →UUID Generator
Generate 1 to 50 random UUID v4 values and copy them all at once.
Open tool →Unix Timestamp Converter
Epoch seconds or milliseconds to ISO, UTC, local time and back.
Open tool →BMI Calculator
Body mass index from metric or imperial measurements, with category and healthy range.
Open tool →Percentage Calculator
Three everyday percentage questions answered at once.
Open tool →Age Calculator
Exact age in years, months and days, plus total days and next birthday.
Open tool →Why browser-based tools
Most online utilities send what you paste to a server. These tools do the work in JavaScript on your own device, so a password, a JSON payload or a Wi-Fi key never travels over the network. That also makes them fast: there is no round trip and no queue.
The only thing this site measures is that a page was viewed. The pageview counter records the path, referrer and UTM tags, plus a daily rotating hash instead of your IP address. It never receives tool input.
What is included
- Codes and secrets: QR codes, Wi-Fi QR codes, passwords, UUIDs.
- Text and data: word counter, JSON formatter, Base64, case converter.
- Converters: units, colors, Unix timestamps.
- Calculators: BMI, percentages, exact age.
Each tool page explains how the calculation works, so you can check the result instead of trusting a black box.
Accuracy and limits
Converters use standard exact factors where they exist (an inch is exactly 25.4 mm; a pound is exactly 0.45359237 kg). Calculators show the formula so you can verify the output. Health and legal figures are screening aids, not advice: BMI does not diagnose anything, and age rules should always be checked against the authority that asks for them.
Frequently asked questions
Are the tools really free?
Yes. Every tool on this site is free to use, with no account, trial or export fee. The site is supported by a small newsletter, not by paywalling features.
Do I need to create an account?
No. Tools open and work immediately. The email form is optional and only used to announce new tools.
Is my input uploaded to a server?
No. Tool calculations run in your browser. The pageview beacon sends only the page path, referrer and UTM tags with a daily hashed visitor key — never the text, password, JSON or files you enter.
Can I use the output commercially?
Yes. QR codes, generated passwords, converted values and other output are yours to use. There is no attribution requirement. Make sure you have the rights to whatever content you encode.
Do the tools work offline?
After a page and its scripts are cached by your browser, most tools keep working without a network connection. The QR tool loads its encoder library on first use, so that first run needs the file to be reachable.
How often are new tools added?
New utilities are added in small batches. Join the optional email list if you want one short notice when a batch ships.