Tools
Handy tools you can use without logging in. What you type is processed in your browser and is mostly never sent to the server.
No matching tool.
Dev & security
Developer Tools
Twenty-eight everyday developer helpers in one place (now with subnet/CIDR, chmod, an HTTP/MIME/port reference, robots/sitemap and dummy data): URL, Base64, HTML and Unicode encoding, JSON formatting, CSV and type generation, Unix time, JWT decoder, hashes, UUIDs, regex, text diff, number bases, cron, certificate/CSR and mail header readers, business registration number checks, and a table converter.
Code Formatter (Beautifier)
Tidy HTML, CSS, JS, JSON, PHP, Java, Kotlin, Shell, Python, SQL, XML and YAML with tabs or spaces (2, 4 or 8), then copy it or export it as colored HTML. Your code is never sent to the server.
Code Minifier
Remove comments and unnecessary whitespace from HTML, CSS, JS and JSON to cut file size. Paste code or open a file (drag and drop works), then copy the result or download a .min file. Your code is never sent to a server.
JSON, XML & YAML Parser
Paste or open a JSON, XML or YAML file to validate it (with the exact line and column of any error), browse it as a collapsible tree, search values and keys, look values up by path, pretty-print or minify it, and convert between formats. Everything runs in your browser — your input and files are never sent to a server.
CSS Generator
Build gradients, shadows (box/text-shadow), rounded corners (border-radius) and flex/grid layouts while watching them, then copy the CSS. Nothing is sent to a server.
Password Generator
Create a hard-to-guess password from a length and character types, or as an easy-to-remember word combination (passphrase). The result never leaves this page.
What is my IP
Check your public IP address and approximate location.
File & Text Encryption
Encrypt and decrypt text or files with a password using AES-256. Everything happens in this browser; your text, files and password are never sent to a server.
Web Page & RSS Checker
Enter an address and our server visits it to check titles, descriptions, Open Graph preview data, response headers, redirects and the SSL certificate expiry — or inspect an RSS/Atom feed for common problems.
Diagram Maker
Draw flowcharts, sequence, ER and Gantt diagrams from text and save them as SVG or PNG (Mermaid syntax). Your text is never sent to a server.
Use offline too
When turned on, tool pages and the files they need are saved on this device so the calculation and conversion tools work without internet. You can also install just the tools on your home screen.
Saving needs a few MB after you turn it on (large tools add more when used). Login information is never saved, and you can turn it off any time. Tools that need the server, such as the QR maker, web page checker, My IP and secret notes, do not work offline.