You attach a RAW file, hit send, and the reply comes back: "can you resend this as PNG?" It happens with print shops, CMS uploads and government portals alike. Here is the clean way to convert, what it does to your file, and the numbers to expect.
RAW vs PNG at a glance
| Format | Compression | Transparency | Animation | Support (2026) |
|---|---|---|---|---|
| RAW | Uncompressed | No | No | Lightroom, Capture One and editing software — never browsers |
| PNG | Lossless | Yes | No | every browser since the early 2000s |
Read the support column first; in most conversions that row alone is the entire motivation.
When PNG beats RAW
RAW (Camera Raw Image) is a uncompressed format made for professional photography, photo editing, maximum quality capture. Its weak spots — huge file sizes, requires processing software, not shareable directly — are exactly where PNG steps in.
PNG (Portable Network Graphics) handles logos, transparency, screenshots, web graphics, and in 2026 its support looks like this: every browser since the early 2000s. On size, the practical picture: a 1080p screenshot is typically 150-400 KB; a 12-megapixel photo can exceed 15 MB.
Typical triggers: an upload form that rejects RAW, a teammate on different software, or a page-speed audit flagging your images.
How to do it (no software installed)
Open the PNG converter and drop your RAW file onto the upload area. Multi-select works, so a whole folder of files goes in at once — useful when a shoot or an export produced dozens of them.
Start the conversion and watch the size readout: the page shows the output weight before you commit to downloading. That single number answers most of the questions people bring to guides like this one.
When the batch finishes, grab the ZIP rather than clicking files one by one — it preserves the original filenames with the new extension.
If a file fails — it happens with corrupted exports — re-saving it once from any viewer and retrying usually clears it. Genuinely broken files fail everywhere, including in Photoshop.
Before you convert: a 30-second checklist
Keep the original. Conversions into lossy formats are one-way; the RAW you started from is your archive copy, so it never gets deleted or overwritten.
Check the destination's rules. If a platform or print shop asked for PNG, it often also has size or resolution limits — knowing them now saves a second round trip.
Group the batch. Converting fifty files in one upload beats fifty single conversions, and the ZIP you get back keeps the set together with its filenames intact.
What actually happens to quality
RAW uses uncompressed compression; PNG uses lossless. The rule of thumb: converting into a lossless format never loses data; converting into a lossy one trades a little fidelity for a lot of kilobytes.
For scale: 20-60 MB per shot on a modern mirrorless camera. After conversion to PNG, expect the relationship to shift — a 1080p screenshot is typically 150-400 KB; a 12-megapixel photo can exceed 15 MB.
Photoshop's "Save for Web" gives the same result with more dials; if you don't already pay for Adobe, you don't need to start for this.
Check the result at 100% zoom, not fitted-to-window: scaling hides exactly the artifacts you are checking for.
The Core Web Vitals angle
Images are usually the heaviest asset class on a page, so format choice flows straight into Largest Contentful Paint — the Core Web Vitals metric Google weighs for ranking. Lighter images, earlier paint, better scores: the chain is that direct.
Pair the format change with loading="lazy" on below-the-fold images and correct display dimensions, and the speed gain typically doubles.
Measure before and after with PageSpeed Insights — the image-weight line item makes the improvement concrete instead of theoretical.
Three pitfalls to skip
Don't upscale before converting — extra pixels invent nothing and inflate the file. Don't convert a screenshot with text into a heavily lossy format if crisp edges matter. And keep the RAW originals archived; storage is cheaper than regret.
None of these ruin a file instantly — they compound across a library, which is why they go unnoticed until the damage is wholesale.
A worked example, with numbers
Take a typical case: 20-60 MB per shot on a modern mirrorless camera. Convert that to PNG and the format's profile takes over: a 1080p screenshot is typically 150-400 KB; a 12-megapixel photo can exceed 15 MB. The percentages vary with image content — flat-color graphics and detailed photos compress very differently — so trust the size readout on your own files over any blog's average.
When fifty files become five hundred
Past a certain volume the bottleneck moves from conversion speed to organization. Name files before converting, not after — the converter preserves names, so a clean naming scheme going in is a clean archive coming out.
Recurring jobs deserve a recurring habit: same folder structure, same batch size, same checks. Boring beats clever at five hundred files.
Thirty seconds of compression theory
Uncompressed storage writes every pixel verbatim. Maximum fidelity and maximum disk usage travel together, which is why these files live in working pipelines and rarely on the public web.
Lossless compression is bookkeeping, not deletion: repeated patterns get written once with a count, and decompression rebuilds every original pixel exactly. The price is that random, noisy content — photographs — barely shrinks.
Every recommendation here is downstream of those mechanics — formats do not have personalities, only algorithms.
Frequently Asked Questions
Can I convert several RAW files at once?
Yes — drop the whole selection into the PNG converter and you get the results back as one ZIP. Batch jobs of 30-50 files are routine; the per-file time stays in the seconds.
Why does my PNG file open differently on Windows and Mac?
Support differs by platform: every browser since the early 2000s. If a recipient cannot open the file, that mismatch is usually the cause — convert to a more universal format like JPEG or PNG for sharing.
Is the converted file bigger or smaller than the RAW?
It depends on content, but the baselines are: 20-60 MB per shot on a modern mirrorless camera, while for PNG: a 1080p screenshot is typically 150-400 KB; a 12-megapixel photo can exceed 15 MB. Flat graphics and photographs sit at opposite ends of every compression curve, so check the size shown before downloading.
Do I need Photoshop for this?
No. Photoshop, Canva and Adobe Express can all export PNG, but for a pure format change a browser converter does the identical job without the subscription or the wait.
Can I convert the PNG back to RAW later?
Yes, the reverse converter exists — but a round trip through a lossy format does not restore discarded data. Treat the original RAW as the master copy and convert from it each time, rather than chaining conversions.
That's the whole job. Run one test file through the PNG converter first, check the result at 100% zoom, then commit the batch.
Written by Giovanni Picaro, a web developer who has been building image tools and optimizing sites since 2019. Sources: MDN image format reference and Google web.dev. Last reviewed: 2026.