Free Image Compressor Online
Compress JPG, PNG and WebP images by up to 80% — no signup, no upload limits, results in seconds.
Drag & drop images or click to upload
Supports JPEG, PNG, WebP, GIF, and BMP formats • Max 50 images
Why Use Our Image Compressor?
Quality Preserved
Smart compression maintains visual quality while significantly reducing file size — up to 80% smaller with no perceptible difference.
Secure & Auto-Deleted
Your images are sent over an encrypted HTTPS connection and compressed on our server. The compressed copies are deleted automatically — when you close the tab, and by a periodic cleanup shortly after. We never view or share them.
Batch Processing
Upload and compress up to 50 images at once. Download them individually or as a single ZIP file.
No Limits, No Signup
Completely free with no account, no watermarks, and no daily restrictions. Compress as many batches as you need.
How to Compress Images Online — 3 Steps
No software, no signup. Upload, choose your level, download — done.
Upload Your Images
Drag and drop JPG, PNG, WebP, GIF or BMP files onto the tool, or click Select Images. You can upload up to 50 images at once for batch compression.
Choose Compression Level
Select Low (best quality, 75% target), Medium (balanced, 55% target), or High (smallest file, 40% target). Medium works well for most use cases.
Download Compressed Files
Review the before/after comparison with savings percentage shown for each image. Download files individually or click Download All (ZIP) to get everything in one file.
How Image Compression Works — JPG, PNG and WebP Explained
Not all image formats compress the same way. Understanding the difference helps you choose the right format and compression level for your specific images.
JPEG / JPG Compression
JPEG uses lossy compression — it permanently removes fine detail that the human eye is least sensitive to. The quality setting (our Low/Medium/High levels) directly controls how much detail is removed. At quality 75 (Low), most people cannot see any difference compared to the original. At quality 40 (High), some artefacts appear in smooth gradients but file sizes drop dramatically — often 70-80% smaller. JPEGs are ideal for photographs, product images, and any image with many colours.
PNG Compression
PNG uses lossless compression by default, which keeps every pixel exactly as it was but leaves the file large. This tool takes a different route: it re-encodes your PNG as a compressed JPEG, which is what makes the big size reduction possible. That works very well for photographs and screenshots of photos. It is not the right choice for logos, icons or illustrations that need a transparent background — transparency is filled with white during conversion, and flat-colour graphics stay sharper as PNG.
WebP Compression
WebP is a modern format developed by Google that typically achieves 25-35% smaller file sizes than JPEG at equivalent visual quality. It supports both lossy and lossless compression, and handles transparency like PNG. WebP is now supported by all major browsers (Chrome, Firefox, Safari, Edge) and is a good choice for web images where you control the format. You can upload WebP files here and they will be compressed, but note that this tool returns JPEG — it does not currently produce WebP output.
5 Reasons to Compress Images Before Publishing
Faster Page Load Times and Better SEO
Google uses page speed as a ranking factor. A page with uncompressed images loading 3-4 seconds slower than a competitor's can rank significantly lower. Compressing images from 2MB to 200KB each directly reduces load time and improves your Core Web Vitals score.
Email Attachments Under Size Limits
Most email providers cap attachments at 10-25MB. A single RAW or DSLR photo can easily exceed this. Compressing images to web-quality keeps them visually sharp while cutting file size by 70-80%, making them easy to send without cloud upload links.
Social Media and Platform Upload Limits
Instagram, Twitter/X, WhatsApp, and most social platforms re-compress your uploaded images anyway — often poorly. By compressing images yourself first, you control the quality and ensure the platform's automatic re-compression does less damage to your image.
eCommerce Product Images
Online stores with many product images benefit the most from compression. A Shopify or WooCommerce store with 500 product images at 2MB each vs 200KB each is loading 600MB vs 100MB of images — a difference customers and search engines both notice. Batch compress product photos before uploading with our 50-image batch processing.
Storage and Bandwidth Costs
Cloud storage (AWS S3, Google Cloud, Cloudinary) charges by GB stored and GB transferred. If your app or website serves thousands of images daily, the difference between 2MB and 200KB per image translates directly into monthly hosting bills. Image compression is one of the highest-ROI optimisations a web developer can make.
Tips for Getting the Best Compression Results
The right approach depends on your image type and end use. Here is how to get the most out of each compression level.
Use Medium for most photos
The Medium level (55% quality) is the best starting point for photography, product shots, and social media images. You get 50-65% file size reduction with no visible quality loss at normal viewing sizes.
Use Low for print or portfolios
If images will be viewed at large sizes — print-ready files, photography portfolios, or banner images — choose Low compression (75% quality). This still reduces file size by 30-50% while preserving fine detail.
Use High for thumbnails and icons
Small images viewed at 100-200px — thumbnails, avatars, preview images — are forgiving of aggressive compression. The High level (40% quality) reduces file sizes by 70-80% with no perceptible difference at thumbnail size.
Check the before/after comparison
After compression, the results page shows each image with its original size, compressed size, and percentage saved. If the savings look low (under 20%), the image may already be optimised, or a different format (WebP vs JPEG) would work better.
Batch compress for consistency
When optimising a full website or product catalogue, upload all images together. The same compression level is applied uniformly, so your site images have consistent file sizes and visual quality throughout.
Compress before OCR for better accuracy
If you are compressing images to use with our OCR text extractor, use Low or Medium compression only. High compression on text-heavy images can introduce artefacts that reduce OCR accuracy.
Frequently Asked Questions
Does compressing an image reduce quality?
It depends on the compression level. At Low (75%) and Medium (55%), quality loss is imperceptible to the human eye at normal viewing sizes. At High (40%), minor artefacts can appear in smooth gradients and solid colour backgrounds — but for thumbnails, web images, and email use, the difference is negligible.
How many images can I compress at once?
Up to 50 images per batch. You can add more images to an existing batch before compressing. There is no daily limit — compress as many batches as you need.
Are my images uploaded to a server?
Yes — compression runs on our server, so your images are uploaded to be processed. The compressed copies are deleted automatically when you close the tab, with a periodic cleanup as a backstop. We keep no copy afterwards and we never view or share your images. All connections use HTTPS encryption.
What image formats does the compressor support?
You can upload JPG/JPEG, PNG, WebP, GIF and BMP. Compressed files come back as JPEG — that is the format this tool compresses to, whatever you upload. Two things follow from that: PNG transparency is filled with white, and only the first frame of an animated GIF is kept. If JPEG cannot make a particular file smaller, you get your original file back unchanged, in its original format.
Is this image compressor free?
Yes, completely free. No account, no subscription, no watermarks. Compress images online as often as you need with no restrictions.