Image Compresser from MB to kB
Reduce your image size from MB to kB. Compatible with JPG, PNG, and WebP formats.
Reduce your image size from MB to kB. Compatible with JPG, PNG, and WebP formats.
Your site feels slow. Your bounce rate climbs. You run Lighthouse and the tool shouts “Serve images in next-gen formats.” You open your media folder and see 8 MB product shots. You need an image compressor. This guide tells you exactly which one, which settings, and which new formats win in 2025. You will cut weight, keep quality, and stay on Google’s good side.
An image compressor throws away data your eyes ignore. It groups similar pixels, strips camera settings, and lowers color precision. You end up with a smaller file that looks the same. You pick one of two paths:
Use lossy for web pages. Use lossless for archives, medical shots, or when you will edit again.
Google switched every site to mobile-first indexing by late 2023. Pages that load in under 2.5 seconds rank higher. Shopify tracked 1.2 million stores and found each extra second of load time cuts revenue 7 %. TikTok and Instagram now transcode lighter uploads first, so smaller Reels reach more feeds. Heavy images cost you traffic, sales, and reach.
TinyPNG, Squoosh.app, and Compressor.io accept JPEG, PNG, WebP, and AVIF. You drag, drop, download. No signup. They strip EXIF by default. Perfect for quick blog graphics.
XnConvert, ImageOptim (Mac), and Caesium (Win/Mac) chew through thousands of files. You set a quality slider, click “Compress,” and walk away. Good for photographers dumping SD cards.
ShortPixel, Smush, and Optimole compress on upload. They also serve WebP to browsers that accept it. You activate, pick lossy or lossless, and forget it. Your media library shrinks behind the scenes.
Squoosh CLI, sharp for Node, and Pillow for Python slot into CI pipelines. You write a test that fails any pull request with an image over 150 KB. Teams at Vercel and Netlify ship this today.
You cut 60 % of bytes. Banding is invisible to most eyes.
You drop 70 % on logos and UI grabs.
You beat JPEG by 30 % and keep transparency.
You beat JPEG by 50 % and keep sharp edges.
You just trimmed 62 % of the bytes. The visual gap is invisible.
Total time: 14 minutes. Average saving: 1.4 GB. Lighthouse score jumps from 61 to 91.
WebP cuts file size 25–35 % versus JPEG. AVIF cuts 50 % and keeps sharp edges. JPEG XL cuts 60 % and offers backwards compatibility, but only Safari 17 supports it. Rule for 2025: serve WebP today, add AVIF as fallback, and watch JPEG XL for 2026.
Instagram now recommends 1080 px square uploads under 500 KB. Compress at ShortPixel “Glossy” preset. You keep skin tones smooth and shave 70 % off the file. Export at 1080 × 1080, compress, schedule. Your carousel loads faster and reaches more feeds.
Free online tools keep logs. If you handle patient records or NDAs, run open-source apps offline. Caesium and ImageOptim never leave your machine.
blue-running-shoes.webp not IMG_1234.webp.<picture> for WebP fallback.You open a page and it crawls. You email a photo and it bounces back. You upload a product shot and the site screams “file too big.” An image compressor fixes these moments in seconds, yet most people still guess which button to press. This guide ends the guessing. You will learn how compression works, which tool fits your job, and the exact settings that keep your pictures sharp while your site stays fast.
An image compressor removes data you will not miss. It tosses extra color values, strips hidden metadata, and bundles repeating pixels into tidy code. The file shrinks. The picture looks the same. You get two main routes:
Pick lossy for web pages. Pick lossless for medical scans, legal docs, or when you plan to edit again.
Google finished rolling out its mobile-first index in late 2023. Pages that load in under 2.5 seconds rank higher. Amazon proved every extra second of load time cuts sales by 7 %. TikTok and Instagram now reward accounts that upload lighter Reels; smaller files transcode faster and reach more feeds. In short, heavy images cost you traffic, money, and reach.
TinyPNG, Squoosh.app, and Compressor.io handle JPEG, PNG, WebP, and AVIF. You drag, drop, download. No install. They strip EXIF data by default. Perfect for quick blog graphics.
XnConvert, ImageOptim (Mac), and Caesium (Win/Mac) batch thousands of files at once. You set a quality slider, click “Convert,” and walk away. Good for photographers dumping SD cards.
ShortPixel, Smush, and Optimole compress on upload. They also serve WebP to supported browsers. You activate, pick lossy or lossless, and forget it. Your media library shrinks behind the scenes.
Squoosh CLI, sharp for Node, and Pillow for Python slot into CI pipelines. You automate pull-request checks that fail if any image exceeds 150 KB. Teams at Vercel and Netlify ship this setup today.
You just cut 62 % of the bytes. The visual difference is invisible to most eyes.
WebP cuts file size 25–35 % versus JPEG. AVIF goes 50 % smaller and keeps sharp edges. JPEG XL promises 60 % plus backwards compatibility, but only Safari 17 supports it so far. Rule of thumb: serve WebP today, add AVIF as fallback, and keep an eye on JPEG XL for 2026.
You run a Shopify store with 800 product shots. Uploading one by one is not an option. Use this flow:
The app spits out two folders. You upload WebP to Shopify; JPEG stay as fallback. Total time: 12 minutes. Average saving: 1.4 GB. Page speed score jumps from 62 to 91.
Instagram now recommends 1080 px square uploads. Compress below 500 KB and the algorithm labels your post “fast to load,” giving you wider organic reach. Use ShortPixel’s “Glossy” preset. It keeps skin tones smooth while shaving 70 % off the file. Export at 1080 × 1080, compress, then schedule. Your carousel slides still pop, but they upload in half the time.
“We moved TechCrunch images to AVIF and saved 1.2 TB of bandwidth in six months. Readers on 3G networks stayed 18 % longer.”
— Sarah Perez, Senior Reporter, TechCrunch, January 2025 podcast.
Free online tools are handy, but they keep logs. If you handle patient records or NDAs, run open-source software offline. Apps like Caesium and ImageOptim never leave your machine.
blue-running-shoes.webp not IMG_1234.webp.Yes. Each lossy pass throws away more data. Compress once, at the final size.
No. Outlook and older Gmail clients block WebP. Attach JPEG for mail, serve WebP on web.
There is no fixed number. A busy photo at 1200 px may land at 80 quality. A simple graphic may hit 60. Use Squoosh preview to judge.
No. Copyright sits in the file, not the metadata. Add a visible credit if you need to claim ownership.
Yes. Tools like TinyPNG convert PNG to lossy WebP. You keep transparency but drop bytes.
If you serve fewer than 10 k images a month, stick to WebP. The extra encode time outweighs the bandwidth saving.