PNG2JPG is a free, browser-based image converter built and maintained by Thrivehash, a small independent web development studio. One simple promise drives everything we build: your files should never have to leave your device just to change format.

Our mission

Every day, people are forced to shrink a PNG for a visa portal, a job application, an exam registration, or an email attachment. Most online tools "solve" this by making you upload your private documents to their servers, where you can't see what happens to them. We built PNG2JPG to remove that trade-off entirely: a converter that is fast, free, and physically incapable of seeing your files, because the conversion never leaves your browser.

Why we built it

The idea came from our own frustration. While helping family members submit university and visa applications, we kept hitting the same wall: portals demanding "JPG under 100KB" and rejecting every upload. The existing converters either uploaded sensitive ID documents to unknown servers, buried the download behind ads and countdown timers, or required trial-and-error to hit the size limit. We knew the browser itself could do the job better, so we built it.

How the technology actually works

We believe a trustworthy tool should explain itself. Here is exactly what happens when you convert a file:

Your PNG is read locally by your browser using the FileReader API, it is never transmitted anywhere.
The image is drawn onto an HTML5 <canvas> element with your chosen background colour, white by default (JPG cannot store transparency).
The canvas re-encodes the image as JPG at your chosen quality using canvas.toBlob().
In Target Size mode, the converter runs a binary search across quality levels, up to eight rapid passes, to find the highest quality that fits under your chosen limit (50KB, 100KB, 200KB, 500KB, or custom).
The finished JPG is handed back to you as a direct download from your own browser's memory.

You can verify this yourself: disconnect from the internet after the page loads, and the converter keeps working. There is no upload, no queue, and no server processing your images.

Our privacy commitment

Because conversions happen on your device, we never see, store, scan, or back up your images, not even temporarily. This isn't a policy decision we ask you to trust; it's how the tool is engineered. The only data we handle is what you voluntarily send through our contact form. Read the full details in our Privacy Policy.

How we keep the tool free

PNG2JPG is supported by a small number of clearly separated display advertisements. Ads never interfere with the converter, never add watermarks, and never gate your downloads behind timers. We don't sell user data, we don't have any image data to sell in the first place.

Our editorial standards

The guides on our blog are written and reviewed by the same developers who build the converter. Every article is based on hands-on testing with real files, includes the actual quality settings and file sizes we measured, and is updated when browser behavior or upload requirements change. If you spot something outdated or incorrect, tell us, we fix it.

Who is behind PNG2JPG?

PNG2JPG is developed by Thrivehash, a web development studio focused on fast, privacy-respecting browser tools. We maintain the converter, write the guides, answer support emails, and ship improvements based on the feedback we receive from users around the world.

Get in touch

Questions, bug reports, or feedback? We read every message. Reach us through the contact page, we usually reply within one business day.