15 tools in three sections. Time and dates: stopwatch, timer, time, days, working days and age calculators. QR and barcodes: camera QR scanner, QR code generator, barcode generator. Photo: compress, resize, crop, HEIC to JPG, image converter, passport photo.

Is it free and without registration?

Yes. No accounts, no limits and no watermarks. The only limit for photos is browser memory; on a regular laptop that means files up to 100-200 MB.

Does it work on a phone?

Yes, in Safari on iPhone and in Chrome on Android. The QR scanner uses the phone camera and photos can be taken straight from the gallery.

Why are there no other tools, such as PDF?

For PDF there is a separate service, PDFone, with 10 tools: merge, compress, split and more. This site collects tools that do not need PDF.

Quick tools that run right in your browser

Stopwatch and timer, date calculators, QR and barcodes, photo processing. No registration, nothing uploaded to a server.

Time and dates

Six tools for time: measure, count down, add hours, count days between dates and calculate age.

Stopwatch A precise stopwatch with laps. Start and stop with the space bar, lap with the L key. Timer Set minutes and seconds or press a preset button. At the end there is a sound and the tab blinks. Time calculator Add or subtract hours, minutes and seconds. Find how much time passes between two moments. Age calculator Exact age in years, months and days. Plus the total number of days and the date of the next birthday. Days between dates How many days, weeks and months between two dates. Or which date is N days from now. Working days Working and calendar days between dates, with your own holidays. Or the date N working days from now.

QR and barcodes

Scan a QR code with your camera or from an image, create your own QR code, generate an EAN-13 or Code 128 barcode.

QR code scanner Scan a QR code with your camera or upload a photo with the code. The link opens with one tap. QR code generator Create a QR code for a link, text, Wi-Fi, contact or phone number. Colour, logo, download as PNG and SVG. Barcode generator EAN-13, EAN-8, Code 128, Code 39, UPC and ITF-14. The check digit is calculated for you, download as PNG and SVG.

Photo

Six tools for pictures: compress, resize, crop, convert HEIC and WebP to JPG, make a passport photo.

Compress image Reduce the size of JPG, PNG and WebP several times without visible quality loss. Many files at once. Resize image Shrink or enlarge a picture in pixels, percent or to a preset size for social networks. Crop image Select the area with a frame, choose 1:1, 4:3, 16:9 or a circle. Download as JPG or PNG. HEIC to JPG iPhone photos to regular JPG so they open on Windows and in any program. Many files at once. Image converter Convert WebP, PNG, AVIF, BMP and HEIC to JPG, PNG or WebP. Many files at a time. Passport photo Make a 35×45 mm, 2×2 inch or 3×4 cm photo from a regular picture. Head guides, a 4×6 inch sheet for printing.

Nothing is sent to a server

The page loads the tool code once, then everything is calculated on your device. The photo you compress and the QR code you scan never leave the browser. After the page has loaded you can go offline.

Photos and data are not uploaded; nobody sees them but you.
No server queue: compressing 20 photos or generating a code takes seconds.
Works offline: just load the page first.

FAQ

What can ToolOne do?: 15 tools in three sections. Time and dates: stopwatch, timer, time, days, working days and age calculators. QR and barcodes: camera QR scanner, QR code generator, barcode generator. Photo: compress, resize, crop, HEIC to JPG, image converter, passport photo.
Is it free and without registration?: Yes. No accounts, no limits and no watermarks. The only limit for photos is browser memory; on a regular laptop that means files up to 100-200 MB.
Does it work on a phone?: Yes, in Safari on iPhone and in Chrome on Android. The QR scanner uses the phone camera and photos can be taken straight from the gallery.
Why are there no other tools, such as PDF?: For PDF there is a separate service, PDFone, with 10 tools: merge, compress, split and more. This site collects tools that do not need PDF.