Reduce Image Size Online
Make your images smaller for web, email, or social media. Supports JPEG, PNG, and WebP — no account required.
Drop your images here
JPG · PNG · WebP · SVG · up to 50 MB each
Why is reducing image size important?
Image file sizes have grown dramatically as camera sensors have improved. A photo from a modern smartphone is often 4–10 MB. While this resolution is excellent for printing, it is far more than needed for web use, email, or social media — and sending or uploading oversized images creates friction at every step.
Reducing image size eliminates that friction: images attach to emails without rejection, upload to platforms without errors, load faster on web pages, and transfer more quickly over mobile networks.
The most common situations where image size matters
- Email attachments. Gmail limits attachments to 25 MB; Outlook to 20 MB. But even within those limits, large images slow down delivery and frustrate recipients. A 2 MB image is universally easier to work with than an 8 MB original.
- Website uploads. WordPress, Squarespace, Wix, and most CMS platforms have upload size limits (often 2–10 MB). Reducing image size before uploading avoids rejected uploads and keeps your media library manageable.
- Social media. Instagram, Facebook, Twitter, and LinkedIn recompress images on upload, often degrading quality. Uploading a pre-compressed image at an appropriate size gives you more control over the final quality the platform produces.
- Messaging apps. WhatsApp compresses images automatically, often significantly. Sharing a pre-compressed image at a reasonable size preserves more detail than letting the app crush it.
- Online marketplaces. eBay, Etsy, Amazon, and other selling platforms have image size limits for listings. Reducing image size ensures your product photos upload correctly.
- Web performance and SEO. Google uses page speed as a ranking factor. The largest images on a page directly affect Largest Contentful Paint (LCP) — a Core Web Vital. Smaller images load faster and improve your search ranking.
- Cloud storage management. If you back up photos to Google Photos, iCloud, or Dropbox, reducing image sizes before backup can save gigabytes of storage over time.
How to get the best results
- For photos (JPEG, WebP): start at quality 80. Compare the original and compressed versions. If they look identical, try 70. Most people cannot see a difference between quality 75 and 100 on screen.
- For graphics, logos, and screenshots (PNG): the compressor uses colour quantisation. Start at quality 80 for transparent PNGs; you can often go lower for solid-colour graphics.
- If you need the absolute smallest file and format is flexible, try converting to WebP — it almost always produces smaller files than compressed JPEG or PNG.
- Always keep the original file. Compress a copy. Lossy compression is irreversible.
Frequently asked questions
How much can you reduce image size without losing quality?
For JPEG and WebP images, you can typically reduce file size by 60–80% at quality 75–85 with minimal visible quality loss at screen sizes. PNG can be reduced by 40–70% using colour quantisation. The quality slider lets you find the right balance.
What is the difference between reducing image size and resizing an image?
Reducing image size (compression) makes the file smaller in kilobytes while keeping the same pixel dimensions. Resizing changes the pixel dimensions — the canvas size — which also makes the file smaller but changes how large the image appears. For web performance, you often want both: resize to the correct display dimensions, then compress to reduce the file size further.
Which format gives the smallest file size?
WebP typically produces the smallest files — 25–35% smaller than JPEG and 25% smaller than PNG at equivalent quality. If you are not restricted to a specific format, converting to WebP will give you the smallest file.
Is my image uploaded to a server?
No. All compression happens in your browser using the Canvas API and pngquant WASM for PNG. Your file never leaves your device.