Vertimo / Convert / PNG to JPG

Convert PNG to JPG on Mac

A PNG is faithful to a fault. Because it stores every pixel losslessly, a single full-screen grab on a Retina Mac can land anywhere from 2 to 12 MB, and a stack of design exports piles up fast. All that fidelity is wasted the moment you try to send one: the recipient does not need a pixel-perfect master, they need a file that opens quickly and slips under an attachment limit. Re-encoding to JPG is the fix, and the payoff is steep. The same image often falls to a few hundred kilobytes, sometimes a tenth of what it was, with a difference your eye has to go looking for.

Vertimo turns that one heavy PNG, or a folder of two hundred of them, into JPGs without a single byte leaving your Mac. You decide how to balance sharpness against size, run the batch, and each JPG lands in the same folder as the PNG it came from, named to match. The originals are left alone, so your archive masters stay exactly as crisp as they were while the lightweight copies go out the door.

How to convert PNG to JPG on a Mac

Open Vertimo and drop in your PNGs, whether that is one screenshot or a whole export folder selected at once.
Choose JPG as the target. Open Advanced to set the quality level, the lever that decides how small the result gets, and leave it as is for routine sharing or push it lower to squeeze harder.
Click Convert. Vertimo writes a JPG next to every PNG, keeps your folder layout intact, and leaves the source files in place.
Attach or upload the JPGs. Bin them afterward if you like, since the PNG masters never budged.

Why turn a PNG into a JPG at all

PNG and JPG split the work between them. PNG is the format your Mac reaches for when it captures a screenshot, because lossless compression keeps text edges, UI lines, and flat color blocks razor-sharp. JPG throws some of that detail away on purpose, and for photographs, mockups, and anything destined for an email or a chat thread, that bargain is exactly what you want. A 6 MB capture re-encoded at a sensible quality typically lands in the 300 to 600 KB range, which is the gap between an attachment that bounces and one that just sends.

The catch is that the format that is best for keeping is rarely the format that is best for sending, so you end up wanting both. Vertimo lets you generate the JPG copies in one pass while the PNGs stay put, so you are never choosing between a clean archive and a sendable file.

Screenshots and full-window grabs that balloon past your mail provider's size cap
Design and slide exports you need to drop into a deck, doc, or message thread
Photo-heavy PNGs where JPG's lossy compression costs you almost nothing visible
Whole folders of captures from a long session, converted in a single run

Why doing this on-device actually matters here

The usual way to shrink a big PNG is to feed it to a browser tool, which means your image rides up to a stranger's server, gets compressed there, and comes back down. That is a lot of trust to extend to a file that might be a screenshot of your inbox, an internal dashboard, a draft you have not shipped, or a client's confidential mockup. With Vertimo the pixels never leave the disk they are already sitting on. There is no upload step, no sign-up wall, and no server in the loop, so even with your Mac fully offline the conversion runs the same.

Because the work is local, the size-versus-quality decision is yours and it happens instantly. Nudge the quality up when the image still needs to read clearly, drop it when you only care about getting under a limit, and watch the trade play out without round-tripping a single file. And since color profiles, EXIF, and other embedded data carry across to the JPG where the format supports them, the smaller copy still behaves like a real photo rather than a stripped-down thumbnail. The engine's test suite checks that carry-over on each release so it does not quietly regress.

Vertimo converts PNG to JPG and dozens of other formats, entirely on your Mac. No upload, no account.

See how Vertimo works →

Questions

Does the JPG keep the image quality and the embedded data from my PNG?

You control the quality directly. JPG is lossy by design, so a copy is never bit-for-bit identical to the PNG, but at a reasonable quality setting the difference is hard to spot, and you can dial it up when an image needs to stay crisp. Embedded data such as color profiles and EXIF is carried into the JPG wherever the format allows, and the conversion engine's tests confirm that on every build. Your PNG originals are never altered, so the lossless master is always there to fall back on.

Is it free to use, and is the internet required?

Your first conversions are free with no card and no account, which is enough to shrink a batch of screenshots and see the result. After that, a one-time Vertimo Lifetime license is $34.99, or Vertimo Pro runs $24.99 a year with a free trial. Either way the converter is a self-contained Mac app that does all its work locally, so it runs identically whether you are online or completely disconnected.

Can it handle a large batch of PNGs in one go?

Yes. Point it at a single file or a folder of thousands, and it converts the whole set in one run, writing each JPG alongside the PNG it came from and preserving your folder structure. There is no per-file fiddling and no per-image upload to wait on, which is the part that makes shrinking a long session of captures tedious in other tools.