WebP vs JPG: Which Should You Use?

JPEG compresses images by splitting them into 8×8 pixel blocks and discarding high-frequency detail your eye is least likely to notice (DCT-based lossy compression). It's simple, fast, and supported by essentially every device, camera, and program on Earth.

WebP borrows its lossy compression from the VP8 video codec, using block prediction: each block is predicted from its neighbors and only the difference is encoded. That prediction step is what makes it more efficient. In Google's own comparative study, lossy WebP files were 25–34% smaller than JPEGs at equivalent SSIM quality scores. WebP also has capabilities JPEG simply lacks: an alpha (transparency) channel, a genuinely lossless mode, and animation support.

For images served on a website, WebP is nearly always the better choice today. The 25–34% size reduction translates directly into faster page loads, better Largest Contentful Paint scores, and lower bandwidth bills. Every modern browser — Chrome, Firefox, Edge, and Safari 14+ — renders it natively, so the fallback machinery that was necessary in 2018 is mostly obsolete.

• Web images of any kind: hero images, product photos, thumbnails, blog images.
• Images that need transparency but are photographic — WebP handles this in one file where you'd otherwise need a bulky PNG.
• Replacing animated GIFs: animated WebP is drastically smaller than GIF for the same clip.

JPG's superpower is that it opens everywhere, without exception. That matters more often than web developers assume:

• Email attachments: many email clients and older webmail interfaces preview JPG inline but treat WebP as an unknown download.
• Office documents, print shops, and legacy software: Word, older CMSes, photo kiosks, and prepress pipelines all accept JPG without question; WebP support is inconsistent.
• Photography workflows: cameras shoot JPG (or RAW), and tools for EXIF metadata, color profiles, and printing are built around it.
• Uploads to third-party platforms: some upload forms, marketplaces, and government portals still reject WebP outright.
• Very large images viewed over slow connections: JPEG's progressive mode renders a low-res preview that sharpens as data arrives — WebP only decodes top-to-bottom.

The '25–34% smaller' figure holds at typical web quality levels, but it isn't universal. At very high quality settings the gap narrows, and WebP's aggressive smoothing can soften fine grain and texture in a way some photographers dislike. Modern JPEG encoders like MozJPEG also closed part of the gap. If you're optimizing a photography portfolio rather than a storefront, test both on your own images instead of trusting averages.

It's also worth knowing that WebP is no longer the frontier: AVIF compresses better still, at the cost of slower encoding. If you're building a picture pipeline from scratch, read our AVIF vs WebP comparison before committing.

You don't need Photoshop for this. Built-in OS tools work: macOS Preview exports WebP to JPEG (File → Export), and Windows Paint can open WebP and save as JPG. But they process one file at a time and give you little control over quality.

1. 1

   Open the FileMorf converter

   The image tab handles JPG, PNG, WebP, HEIC, and more — entirely in your browser using the Canvas API. Files never upload to a server.

2. 2

   Drop in your images and pick the output format

   Convert JPG to WebP for the web, or WebP back to JPG for compatibility. Batches are fine, and you can adjust quality.

3. 3

   Download individually or as a ZIP

   Batch conversions bundle into a single ZIP download.

Use WebP when you control where the image is displayed — your website, your app — and file size matters. Use JPG when the image leaves your control: email, documents, uploads to other platforms, printing, or anything involving software you can't vouch for. When in doubt about compatibility, JPG's universality has never once been the wrong safe answer.