The Right Image Format and Size for Every Platform

Use JPG for photographs, PNG for logos, icons, and anything needing transparency, and WebP for images inside web pages. Print work wants TIFF or maximum-quality JPG at 300 DPI, and email attachments want a resized JPG because of size limits. The whole decision reduces to one question: does the image have smooth color gradients (a photo, so lossy) or crisp edges and few colors (a graphic, so lossless)?

Even the same photo needs a different format and size depending on where it goes. Settings that are perfect for a web page fall short for a print shop, and a size tuned for social media can be overkill for an email attachment. Decide your rules by use case once and you never have to agonize again.

Start with one big principle: JPG for images with smooth, continuous color like photos, and PNG for logos, text, and anything needing transparency. From that baseline, here is the breakdown by situation.

In-article web images

Format — JPG for photos (quality 75-85%), PNG for logos, icons, and charts
Width — usually 1200-1600px is plenty for a content column
File size — aim under 200KB per image for a snappy load
Prefer WebP/AVIF when you can — 20-50% lighter than JPG at the same quality (supported by most browsers)

Social media (Instagram, X, Facebook)

Format — mostly JPG; the platform re-compresses anyway, so no need to upload a huge original
Square posts — 1080x1080px
Portrait posts and stories — 1080x1350px or 1080x1920px
Text-heavy cards — re-compression muddies text, so uploading as PNG keeps it crisper

Print and output

Format — PNG or top-quality JPG, since you want no quality loss
Resolution — prepare at 300ppi, not the 72ppi used for screens
Size — pixels = physical print size x 300ppi (e.g. 10cm is about 1181px)
Color — expect shifts because screens are RGB and print is CMYK

Email attachments and messaging

Format — JPG for photos you just want to send
File size — keep each image under 1MB out of courtesy to the recipient
Size — if it will only be viewed on screen, 1600-2000px on the long edge is enough
For several images, compress each or bundle them into a single PDF

When to use WebP and AVIF

WebP and AVIF are relatively modern formats that pack the same quality into a much smaller file. They are especially useful when optimizing website speed. But older software and some apps may not open them, so for attachments and sharing where compatibility matters, JPG and PNG are still the safe choice. Think of it as modern formats for display, universal formats for distribution.

In short

To sum up: JPG for photos, PNG when you need sharpness or transparency, WebP/AVIF for web speed, and above all, size the image to its purpose. Using an oversized original as-is is the single most common mistake.

You can convert formats and adjust size and file weight right in Switching's PNG to JPG, JPG to PNG, and image compression tools. Files are processed entirely inside your browser and never uploaded to a server, so you can adapt work documents and personal photos to any use case with peace of mind.

Frequently asked questions

Is WebP safe to use everywhere now?

On the web, effectively every current browser supports it. Outside the web is the problem: some government upload forms, older document editors, and print shop intake rules still reject it. Keep files you have to submit somewhere as JPG or PNG.

Is AVIF better than WebP?

It produces smaller files at the same quality. But encoding is slower and support is narrower than WebP, so unless you run a high-traffic site the gain is modest. A common setup is WebP as the baseline with AVIF added selectively.

Can I send JPG files to a print shop?

At maximum quality this is usually fine. Because JPG is lossy, though, every open-edit-save cycle degrades it a little, so keep your working master as TIFF or PNG and export JPG only for the final delivery.

Is there any reason left to use GIF?

Only for short animations. Its 256-color limit makes it unsuitable for photos and the files are large. For the same animation, WebP or a video file is far lighter and much sharper.