Image Format Guide — JPG vs PNG vs WebP and When to Use Each

JPG, PNG, WebP, HEIC — there are so many image formats, and each one has a different purpose.

Picking the wrong format means your files are either too large or too low in quality.
This guide breaks it all down so you can choose the right one every time.

Quick Comparison

When to Use Each Format

JPG — Photos and Everyday Images
JPG is the standard for photographs. It compresses well and works everywhere. Use it for blog posts, email attachments, and social media. The tradeoff: no transparency and slight quality loss on each save.

PNG — Logos, Icons, and Screenshots
PNG keeps every pixel perfect. It supports transparent backgrounds, which makes it essential for logos and graphics. The downside is larger file sizes, especially for photos.

WebP — The Modern Web Choice
WebP gives you 25-35% smaller files than JPG at the same quality. All modern browsers support it. If you run a website, switching to WebP is one of the easiest speed wins.

HEIC — iPhone Default
Great compression with high quality, but limited support outside Apple devices. You will often need to convert HEIC to JPG or PNG before sharing.

How to Convert Between Formats

iTool makes format conversion simple and free. Everything runs in your browser.

Step 1: Pick Your Target Format

• Need JPG? Use Convert to JPG
• Need PNG? Use Convert to PNG
• Need WebP? Use Convert to WebP
• Have HEIC files? Start with HEIC Viewer

Step 2: Upload and Convert
Drag and drop up to 20 images. Conversion happens instantly in your browser.

Step 3: Download
Grab individual files or download all as a ZIP.

Choosing the Right Format

FAQ

Q. What is the best format for websites?
WebP. It is 25-35% smaller than JPG at the same visual quality, and all modern browsers support it.

Q. When should I use PNG over JPG?
Use PNG for images that need transparency (logos, icons) or pixel-perfect detail (screenshots, text overlays). JPG is better for regular photos.

Q. Can I convert formats without losing quality?
Going from PNG to PNG or PNG to WebP (lossless mode) preserves quality. Converting to JPG involves lossy compression, but high-quality settings make the difference minimal.

Q. What is HEIC and why can’t I open it?
HEIC is the default photo format on iPhones since iOS 11. Windows and most non-Apple apps cannot open it natively. Convert it to JPG or PNG using iTool’s converter.

Related Tools

• Convert to JPG - Universal photo format
• Convert to PNG - Lossless with transparency
• Convert to WebP - Best for web performance
• HEIC Viewer - Open iPhone photos anywhere
• Image Compress - Reduce file size in any format

Pick the right format and convert for free with iTool!