JPG vs PNG vs WebP: which to use
Every image format is a trade-off between file size, quality and compatibility, and the right one depends entirely on what the image is for — a photo for an exam form, a graphic for a website, or a screenshot you're sharing with someone all have different answers.
The three formats at a glance
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| JPG/JPEG | Lossy (some quality trade-off) | No | Photos, exam/ID uploads — near-universal acceptance |
| PNG | Lossless (no quality loss) | Yes | Screenshots, logos, graphics with sharp edges or text |
| WebP | Lossy or lossless (flexible) | Yes | Fast-loading websites — not widely accepted by Indian government forms |
Why JPG is still the safe default for forms
Despite being the oldest of the three, JPG remains the format almost every Indian exam portal, printer, and older device accepts without question. Its lossy compression is actually an advantage for photo uploads specifically, since it can shrink a photo dramatically while keeping it visually convincing — exactly what a KB-limited form upload needs. If a form doesn't explicitly say otherwise, JPG is the safest choice.
When PNG is genuinely the better choice
PNG's lossless compression means zero quality loss, which matters for screenshots, text-heavy graphics, or logos with sharp edges — a JPG version of the same content often shows visible fuzziness ("artifacting") around hard edges and small text, since JPG compression assumes a smooth photograph rather than crisp lines. PNG is also the only one of the three that most tools handle transparency correctly with, useful for a logo or graphic meant to sit over different backgrounds.
Where WebP fits, and where it doesn't
WebP was built by Google specifically to make websites load faster — it typically produces smaller files than JPG at similar visual quality, which is genuinely useful for a website's own images. The catch: most Indian government exam and recruitment portals were built before WebP support was common and simply don't accept it, so despite its technical advantages, it's the wrong choice for form uploads. Convert to JPG before submitting anywhere that isn't a modern website.
When WebP is not accepted, and what to use instead
WebP usually produces a smaller file than JPEG or PNG at similar visual quality, but not every government portal, older software, or print shop workflow accepts it, since it's a newer format than either of the other two. When a form or tool doesn't explicitly list WebP among its accepted formats, it's safer to assume it isn't supported and convert to JPEG (for photos) or PNG (for graphics with sharp edges or transparency) rather than finding out from a rejected upload. Browsers and modern phone camera apps both handle WebP fine for viewing, so the compatibility gap is mostly on the upload/processing side, not on simply opening or looking at the file.
If file size is the main concern and WebP isn't accepted, a well-compressed JPEG at the right pixel dimensions is usually a close second in size, which is why the three-way comparison usually comes down to JPEG versus PNG in practice for form uploads.
Frequently asked questions
Which format should I use for an Aadhaar/PAN/exam photo?
JPG/JPEG — it's what virtually every Indian government form and exam portal expects and accepts.
My phone saves photos as HEIC, not JPG — is that a problem?
For most uploads, yes — HEIC isn't accepted by most exam and government portals, so convert it to JPG first.
Is WebP always smaller than JPG?
Usually, at similar visual quality, but the difference varies by image — the bigger issue for Indian forms is compatibility, not size.
Why doesn't a government portal accept my WebP photo?
Many portals only accept older formats like JPEG or PNG since WebP is newer and not universally supported for uploads; converting to JPEG or PNG usually solves this.