Image & PDF compressor
A scanned prescription that weighs 12 MB, a photo the insurer’s portal refuses? Shrink your files in a few seconds, with nothing to install and without the document ever leaving your device.
Compress your file
JPEG, PNG or PDF, one file at a time. Everything happens on your device: nothing is sent over the internet.
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What is it for in your practice?
- E-mailing a prescription or a report without hitting the attachment size limit (20 to 25 MB on most mailboxes).
- Uploading a document to a health insurance fund or insurer portal that rejects heavy files.
- Keeping patient files light: scans of a few hundred kB instead of 10 MB add up for your storage and your backups.
- Sending faster from your phone over 4G, on a home visit, between two patients.
In practice, a smartphone photo or a scan comes out 5 to 50 times lighter depending on the document, and stays readable.
Your documents stay with you
A prescription, a report, a photo taken during a session: that is health data, and it has no business sitting on the server of some random compression website. Here your browser does the work, on your own device. No file is sent to us, nothing is stored, and we never see what you compress. Close the tab and it is all gone.
You can check for yourself: once the tool is on screen, switch off your internet connection. It keeps working.
Which settings should you pick?
- Maximum size
- This is the length, in pixels, of the longest side of the image (or of each scanned page in a PDF). Between 1024 and 1536 px a prescription stays comfortably readable. Go towards 2048 px if the writing is small or handwritten.
- JPEG quality
- Between 70 and 80 you cannot see the difference with the naked eye and the file shrinks a lot. Below 60, text starts to smudge.
If in doubt, keep the defaults (1024 px, quality 75), open the result and check that everything is readable. If not, raise the size and try again: your original file is never modified.
Good to know
Born-digital PDFs do not get smaller
A PDF exported from Word, from your software or from a website contains text, not images: it is already light and there is nothing to compress. The tool then hands the file back untouched, without damaging it. The gains are on scans and photos.
iPhone photos in HEIC format
HEIC, the default format on iPhone, is not supported. Most of the time the iPhone converts the photo to JPEG by itself when you select it here. If you do get an error, go to Settings > Camera > Formats and choose “Most Compatible”, or export the photo as JPEG before compressing it.
Frequently asked questions
- Are my files sent anywhere?
- No. Compression happens entirely in your browser, on your own device. No file is sent to Kiné Helper or to anyone else, and nothing is kept once you close the tab.
- Is it really free?
- Yes: no account, no maximum number of files, no watermark. You do not need to be a Kiné Helper customer to use it.
- What format do I get my file back in?
- A PDF stays a PDF. A JPEG or PNG image comes out as a JPEG, the lightest format for a photo or a scan. The tool handles one file at a time, and the original is never modified.
- Does it work on a phone or tablet?
- Yes, in any recent browser (Chrome, Safari, Firefox, Edge), with nothing to install. Allow a few seconds for a large scan on a phone.
A free tool from Kiné Helper, the software for physiotherapists, built by a physiotherapist. See all tools