How to convert PNG to JPG

A practical guide · Updated June 2026

Converting a PNG to a JPG is one of the most common image jobs there is — and one of the easiest to get slightly wrong. Do it well and you shrink a bulky file to a fraction of its size with no visible loss. Do it carelessly and you end up with an ugly white box where a smooth transparent edge used to be, or a photo that looks soft and blocky. This guide walks through exactly why you would convert, what actually changes when you do, the quality settings that matter, and how to convert many files at once — all without uploading a single image to a server.

Why convert PNG to JPG in the first place

PNG and JPG were designed for different jobs, and swapping between them is usually about matching the format to the situation. There are two big reasons people convert a PNG into a JPG:

File size. PNG is lossless, which is wonderful for crisp graphics but terrible for photos. A photograph saved as PNG can easily be 3–5 times larger than the same picture saved as a good-quality JPG. If you took a screenshot of a photo, or exported a photo from an app that defaulted to PNG, converting to JPG can drop a 4 MB file to well under 1 MB.
Compatibility and expectations. JPG is the universal language of photographs. Some upload forms, print services, older content management systems and email clients still expect a JPG, and a few even reject PNG files above a certain size. When a system says "upload a JPEG," converting is the fastest fix.

A useful rule of thumb: if the image is a photograph — lots of colours, gradients, soft detail — JPG is almost always the better home for it. If it is a graphic — a logo, an icon, a chart, a screenshot of text — think twice before converting, for reasons we will cover below.

What you lose when you convert: transparency

This is the single most important thing to understand before you convert, because it surprises people. JPG cannot store transparency. PNG has an alpha channel that lets pixels be fully or partially see-through; JPG has no such thing. So the moment you convert, every transparent pixel has to become a solid colour.

By default that colour is white. A logo on a transparent background will suddenly sit inside a white rectangle. A product photo cut out from its background will gain a white box. That is fine if you are placing the image on a white page anyway, but jarring on a coloured or dark layout.

Good converters let you choose the fill colour. If you know the image will live on a specific background — a dark slide, a coloured banner, a brand-coloured card — set the matte colour to match before you export, and the seams disappear. If you cannot predict the background, that is a strong sign you should keep the PNG instead.

When you should keep PNG (don't convert)

Converting is not always the right call. Stick with PNG when any of these apply:

You need transparency. Logos, badges, stickers and cut-out product shots that must sit on varied backgrounds belong in PNG (or WebP).
The image is text or line art. Screenshots of documents, code, spreadsheets or UI have hard edges. JPG's compression smears those edges into faint halos called "artifacts," making text look fuzzy. PNG keeps them razor-sharp.
You will keep editing it. Every time you save a JPG it re-compresses and loses a little more. If a file is a work in progress, keep a PNG (or another lossless master) and only export to JPG at the very end.
It is a flat-colour graphic. Charts, diagrams and illustrations with large blocks of solid colour often compress smaller as PNG than as JPG, and look better too.

How to convert PNG to JPG, step by step

The mechanics are simple once you know what each control does. Using a browser-based converter like Imagloo, the flow is:

Open the converter and drag your PNG file (or several) onto the drop zone.
Choose JPG as the output format from the format selector.
Set the background colour for any transparent areas — white is the safe default, but pick a colour that matches where the image will be used.
Pick a quality level. This is the slider that trades file size against fidelity (more on the numbers below).
Convert and download. The tool produces a new JPG and leaves your original PNG untouched, so nothing is destroyed.

Because the work happens in your browser, there is no upload wait and no queue — even a large batch finishes in seconds on a normal laptop.

Choosing the right quality setting on export

JPG quality is usually shown as a number from 1 to 100. Higher means better-looking and bigger; lower means smaller and rougher. The number is not a percentage of anything you can see linearly — the useful range is narrower than it looks. Here are practical guidelines:

90–100: Near-original quality with only modest savings. Use for hero images, portfolios and anything where fine detail is the whole point.
80–90: The sweet spot for most work. At this level, JPG artifacts are invisible to the naked eye on typical photos, and files are often 60–80% smaller than a lossless copy. If in doubt, start at 85.
60–80: Noticeably smaller files with faint softening in fine textures. Good for web thumbnails, email and situations where speed beats perfection.
Below 60: Visible blockiness and colour banding. Reserve this for cases where tiny size is the only thing that matters.

Rule of thumb: convert at 85, look at the result at 100% zoom, and only drop lower if the file is still too big. There is rarely a reason to go above 92 — the extra bytes buy detail your eyes cannot resolve.

Converting the other direction: JPG to PNG

Sometimes you need to go the opposite way. Converting JPG to PNG will not restore quality that JPG already discarded — the detail is gone for good — but it is still useful:

To stop further loss. If you are about to edit a JPG repeatedly, convert it to PNG first so every save stays lossless from that point on.
To add transparency. You can convert a JPG to PNG and then erase a background to make it see-through. The PNG is the container that makes transparency possible.
For tools that require it. Some design and printing workflows insist on PNG input.

Just remember: a JPG-to-PNG conversion often produces a larger file, because you are wrapping already-compressed photo data in a lossless format. It preserves what is there; it does not improve it.

Should you convert to WebP instead?

If your images are headed for a website, there is a strong third option worth knowing. WebP supports both lossy and lossless compression and transparency, and at the same visual quality it is typically 25–35% smaller than JPG. That makes converting PNG or JPG to WebP the best choice for web performance in 2026 — every modern browser handles it.

PNG → WebP: keeps transparency while cutting file size dramatically. Ideal for logos and graphics on a website.
JPG → WebP: shrinks photos further with no visible quality drop.
Keep a JPG or PNG fallback only if you must support very old software that cannot open WebP.

In short: convert to JPG for maximum compatibility and simple photo storage; convert to WebP when the destination is a modern web page and speed matters.

Batch converting many files at once

Converting one image is easy; the real time-saver is converting dozens together. When you have a folder of PNG screenshots or exports to turn into JPGs, batch conversion applies the same format, background colour and quality to every file in one pass. A few tips:

Pick settings for the whole set. Batch tools use one quality and one matte colour for all files, so group images that share a destination before you start.
Watch the mixed-content trap. If a batch contains both photos and text screenshots, a single JPG quality setting will over-compress one and bloat the other. Split them into separate batches.
Download as a zip. Most browser converters bundle the results so you get everything in one file rather than clicking through each one.

Privacy: convert in your browser, not on a server

Many free converters work by uploading your images to their servers, processing them there, and sending back the result. That is fine for a meme, but risky for anything private — ID scans, medical documents, unreleased designs, personal photos. Once a file leaves your device you are trusting someone else's storage and retention policy.

The safer approach is in-browser conversion, where all the work happens locally using your own computer's power. Nothing is uploaded, nothing is stored on a server, and the conversion keeps working even with your Wi-Fi switched off — a quick way to confirm a tool is truly local. Imagloo's tools are built this way on purpose: your images never leave your machine.

Frequently asked questions

Does converting PNG to JPG reduce quality?

Converting to JPG applies lossy compression, so some detail is discarded. At a quality setting of 80–90% the loss is invisible to the eye for most photos, while the file gets dramatically smaller. The original PNG is never changed, so you can always re-export at a higher quality if you are not happy with the result.

What happens to transparency when I convert PNG to JPG?

JPG does not support transparency, so any transparent areas are filled with a solid background colour — white by default, or a colour you choose during export. If keeping a see-through background matters, stay with PNG or convert to WebP, both of which support an alpha channel.

Is it safe to convert images online?

It depends on the tool. Imagloo converts images entirely inside your browser, so your files are processed on your own device and never uploaded to a server. That keeps private photos, screenshots and documents on your machine, and it means conversion still works even when you are offline.

Try it yourself — free, in your browser

You can convert PNG to JPG (and back, or to WebP) in seconds with our free, private tools — your images are never uploaded:

Image Converter — convert PNG, JPG and WebP in any direction, with a background colour and quality control.
Image Compressor — shrink file size while keeping quality, single files or batches.