Converting an image means changing it from one format to another — for example turning a PNG into a JPG, a HEIC photo into a standard JPG, or any image into modern WebP. Each format has a purpose: JPG for small photos, PNG for transparency and sharp graphics, WebP for the smallest size on the web. Converting lets you meet a website's required format, shrink a file, or make an image open on any device.
With Doctor PDF you drop an image, pick the output format, optionally resize it, and download the converted file instantly — with no quality lost to a server round-trip.
Every conversion happens inside your browser. Your images — personal photos, ID scans, screenshots — are never uploaded to any server and never leave your device.
Because there is no upload, conversion is instant, works offline once the page is loaded, and has no limit on how many images you can convert.
Tired of ads, file limits, and uploading your documents to a stranger's server? Doctor PDF is built differently:
Yes. Doctor PDF converts images between formats 100% free with no limits.
Convert between popular formats including JPG, PNG, WebP, and more.
Yes. Change the dimensions and quality at the same time as converting.
Yes. Everything runs locally in your browser — your files are never uploaded to any server.
Yes, on any modern browser — phone, tablet, or computer.