Utility

Turn a URL or any text into a QR code and save it as a PNG. The size is adjustable from 128 px to 1024 px in 64 px steps, and both the dot colour and the background colour can be set. You can match a document or flyer's palette, but low contrast stops cameras from reading the code, and the tool warns you about that. For print, keep the quiet zone clear and stick to a high-contrast pairing.

The generated code can be copied to the clipboard and pasted straight into a document — useful for putting a URL on a business card or an event flyer, or for sharing Wi-Fi details and contact information.

Seal Stamp Maker designs round, elliptical, date, and text seals and saves them as PNG. You can set the top, centre, and bottom text with individual font sizes, the typeface, the colour, and the border, and date seals can use either Western or Japanese era formats. Copy the finished seal to the clipboard and press Ctrl+V in PDF Markup or Image Markup to stamp it directly — no printing and re-scanning.

Camera Capture photographs a document, business card, or receipt with your device camera and passes it straight into the other tools. You can switch between the front and rear camera, and send the shot on to Image to PDF, turning paper into a submittable PDF without a scanner.

Bundle several files into a single ZIP, optionally encrypted. Two schemes are available. The traditional one (ZipCrypto) favours compatibility and opens in virtually every extractor, including the one built into Windows. AES-256 is considerably stronger, but built-in OS extractors often cannot open it, so the recipient needs a tool that supports it.

One caveat that matters: ZIP encryption protects the contents of the files, not their names. The file listing inside the archive stays readable, so rename anything whose filename is itself sensitive before you compress.

Since password-protecting a PDF is not supported, this ZIP tool is the practical substitute when you need to hand a document over securely. It also works as the end point of a chain, collecting the output of other tools into one archive.

Hash Converter computes a hash of the text you enter, in MD5, SHA-1, SHA-256, or SHA-512, updating as you type. Use it to compare against a published checksum, or to confirm that the same string always yields the same digest. Note that MD5 and SHA-1 are known to be vulnerable to deliberate collisions and should not be relied on for tamper detection — choose SHA-256 or stronger for anything new.

Time Converter moves between Unix timestamps and readable dates in UTC, Japan time (UTC+9), and US Eastern time (UTC−5). It answers both "what moment is this number in the log?" and "what is the timestamp for this date?". US Eastern is calculated as a fixed offset, so daylight saving time is not accounted for.

Hashes are computed with the browser's built-in cryptography API; QR codes and seal stamps are drawn on a canvas and exported as PNG. ZIP creation and encryption run in an in-browser library, and the camera tool uses the browser's own device-camera interface. In none of these cases is your text or your file transmitted anywhere.

The camera is the one tool that needs a permission — access to your device camera, managed by the browser itself. Captured images live only in the page's memory, are never uploaded, and are discarded when you close the tab.

These tools earn their keep in combination with the others. Photograph a document and send it to Image to PDF for something submittable; design a seal and stamp it in PDF Markup; collect finished files into a password-protected ZIP to hand over. Each step passes to the next without saving and re-opening files.

Because it all happens in the browser, no intermediate file is left sitting on a server, and the final result goes to your own Downloads folder.