Compress JPG, PNG, WebP, AVIF, GIF and BMP images in seconds — right in your browser. Batch processing, live drag-to-compare preview, target file size mode, format conversion, smart resize, watermarking, and real-time savings stats. Everything is 100% private.
Choose output format, quality, resize and options — then drop your images
Typical file size reduction compared to unoptimised originals at quality 82. Results vary by image content.
Professional-grade image compression with a complete set of tools, running privately in your browser.
Drop unlimited images at once. All files compress simultaneously with individual progress tracking and status badges.
One-click presets for Max (95), Web (82), Social (70), and Tiny (55) — plus a fine-grained 1–100 slider for precise control.
The "Slide" preview tab shows a draggable divider between original and compressed — see the difference at any split point.
Set a maximum KB target and the compressor automatically finds the right quality level to hit it — no guesswork required.
Convert between JPG, PNG, WebP, and AVIF during compression. Output AVIF for maximum savings or JPG for maximum compatibility.
By width, height, custom dimensions, percentage, max dimension, cover crop, or "contain" fit — all with aspect ratio preservation.
Bake a copyright notice or brand name into every output. Configure position (5 options), opacity, and text colour.
Convert colour images to greyscale during compression. Great for reducing file size on images where colour adds no value.
Remove EXIF, GPS location, camera info, colour profiles and ICC data from compressed output for maximum privacy and smaller files.
Real-time summary showing total files, completed, original size, compressed size, bytes saved, and percentage reduction.
Keep original names, add a prefix or suffix, auto-number outputs, or append a timestamp to prevent filename conflicts.
Zero uploads. All compression happens inside your browser via the Canvas API. Your images never leave your device under any circumstance.
Everything you need to know about compressing images for the web, email, and social media
If you have ever waited impatiently for a website to load while staring at a blank space where an image should be, you have experienced the direct consequence of poor image compression. Images are almost always the heaviest assets on any webpage — they account for roughly 60 to 70 percent of the total page weight on an average website. When they are too large, everything suffers: your page loads slowly, your visitors leave, your search rankings drop, and your hosting costs go up.
The good news is that image compression is one of the highest-return optimisations available to any website owner, photographer, designer, or developer. A 5MB unoptimised product photo can often be reduced to under 200KB without any visible quality loss when compressed correctly. That is a reduction of over 96 percent — and it translates directly into faster load times, better user experience, and measurable improvements in key search ranking signals like Google's Core Web Vitals.
The rule of thumb: For most web images, aim for a file size under 200KB. Hero images and full-width banners can go up to 400KB. Thumbnails and gallery previews should ideally be under 80KB. Product images destined for e-commerce marketplaces should follow platform-specific guidelines.
Image compression is the process of reducing an image file's size by eliminating or reorganising the data it contains. There are two main types:
Our compressor uses the browser's native HTML5 Canvas API to re-encode images. This is the same technology used by professional image tools — it re-renders the image on a canvas element and outputs a newly encoded version at your chosen quality level and format. The result is typically far smaller than the original while remaining visually near-identical to the human eye.
The format you choose has a bigger impact on file size than any other setting. Here is a practical breakdown to help you make the right decision:
JPEG has been the dominant photo format for over 30 years, and for good reason. It offers excellent lossy compression for photographs and works everywhere — every browser, email client, social media platform, print service, and operating system handles JPEG natively without any issues. Use JPEG when universal compatibility is non-negotiable: e-commerce listings, email attachments, social media, and print.
WebP was developed by Google specifically for web use and is now supported by all major browsers (Chrome, Firefox, Safari, Edge). It produces files roughly 25–35 percent smaller than equivalent JPEG images, supports transparency like PNG, and can handle both lossy and lossless compression. If your images are destined for a website and you do not need to support very old browsers, WebP should be your first choice.
AVIF (AV1 Image File Format) is the newest entrant in mainstream image formats, and it produces the smallest files of any widely supported format. At equivalent visual quality, AVIF files are typically 50 percent smaller than JPEG and 30 percent smaller than WebP. It supports HDR, wide colour gamut, transparency, and animation. The trade-off is slower encoding (which our tool handles entirely client-side) and slightly lower browser support (about 80% globally as of 2024). For cutting-edge web projects where page speed is critical, AVIF is worth using.
PNG uses lossless compression, which means every pixel is preserved exactly. This makes it the right choice for logos, icons, screenshots, diagrams, and any image that contains text or sharp geometric shapes that would show JPEG compression artifacts. The downside is that PNG files are significantly larger than equivalent JPEG or WebP files for photographic content. Use PNG when quality and transparency matter more than file size.
| Format | Best For | Transparency | Lossy | Lossless | Avg Saving vs JPEG | Compatibility |
|---|---|---|---|---|---|---|
| JPEG | Photos, e-commerce, print | ✗ No | ✓ Yes | ✗ No | Baseline | Universal |
| WebP | Web photos & graphics | ✓ Yes | ✓ Yes | ✓ Yes | 25–35% smaller | 95%+ browsers |
| AVIF | Modern web performance | ✓ Yes | ✓ Yes | ✓ Yes | 40–55% smaller | ~80% browsers |
| PNG | Logos, icons, screenshots | ✓ Yes | ✗ No | ✓ Yes | Larger | Universal |
The quality slider is the single most powerful control for balancing file size against visual fidelity. Here is a practical guide to quality settings that professional web developers and designers use:
Sometimes you need to hit a specific file size — a client has specified a 200KB maximum for all images, or an email service provider limits attachment sizes, or a form upload has a strict byte limit. Manually adjusting the quality slider to hit a target is tedious and imprecise. The target file size feature solves this by automatically running a binary search through quality levels until it finds the setting that produces a file at or below your target while maintaining the best possible visual quality at that size. It is a genuinely useful feature that most online compressors do not offer.
Since 2021, Google has incorporated Core Web Vitals into its search ranking algorithm. These are a set of real-world performance metrics that measure how users experience the speed and stability of a webpage. Images directly affect two of the three key metrics:
LCP measures how long it takes for the largest visible element on the page — almost always an image — to finish loading and become visible to the user. Google's target is under 2.5 seconds. An uncompressed 3MB hero image can easily push LCP beyond 5 or 6 seconds on a typical mobile connection, which has a direct negative impact on your search rankings and your bounce rate. Compressing that image to under 300KB can bring LCP well within the target threshold.
While TBT is more related to JavaScript execution, CLS — which measures visual stability — is directly affected by images. If an image loads without explicit width and height attributes in the HTML, the browser does not know how much space to reserve, causing the page to jump when the image loads. Always include width and height attributes on your image elements. Beyond that, smaller compressed images arrive faster, giving the browser more time to lay out the page correctly before the user starts scrolling.
<picture> element with a JPEG fallback for older browsershandmade-leather-wallet-black.jpg not IMG_3092.jpg)alt text — it is read by screen readers and indexed by Google's image search algorithmloading="lazy" on all below-the-fold images to defer loading until the user scrolls near themCache-Control header so repeat visitors receive images from their local cache rather than downloading them againEvery digital photograph contains embedded metadata — invisible data stored alongside the image pixels that describes the image and the conditions under which it was taken. This data, known as EXIF (Exchangeable Image File Format), can include:
When you publish images on a website without stripping this metadata, anyone who downloads or inspects the image file can extract it — including the GPS coordinates of your home or workplace if you photograph from there. Stripping metadata before publishing is both a privacy best practice and a performance optimisation, as EXIF data can add 50–150KB to a file unnecessarily.
Our metadata stripping toggle removes this data during compression. For sensitive images or any photo taken at a location you do not wish to disclose publicly, enable this option every time.
Each time you compress a lossy JPEG, you re-encode it and introduce a new round of compression artifacts. If you compress a JPEG at quality 80, then compress the result again at quality 80, the second output is not quality 80 — it has been degraded twice. Always start from the highest-quality original you have. Our compressor works best when given pristine source files, not already-compressed outputs.
PNG is a lossless format designed for graphics, logos, and illustrations. Using it for photographs produces enormous files with no quality benefit over JPEG. A photograph saved as PNG is typically 3–5 times larger than the same photograph saved as a quality-80 JPEG with no visible difference. Always use JPEG, WebP, or AVIF for photographic content.
Compressing a 6000×4000 pixel photograph to quality 70 produces a smaller file than quality 100 — but it is still a very large image being served to users who may only see it at 800×600 pixels. The single most impactful optimisation is resizing the image to the largest dimensions it will ever be displayed at, and then applying quality compression. Our resize feature handles this automatically — simply choose your target dimensions or use the percentage or max-dimension modes.
A compression level that looks perfect on a high-resolution desktop monitor may show visible artifacts on a phone screen held at reading distance. Always test compressed images at 100% zoom on a range of devices. The Slide preview feature in our compressor lets you drag to compare original and compressed versions side by side — use it to verify quality before downloading.
Amazon, Etsy, Shopify, and eBay all have specific image requirements. Amazon requires JPEG for most product categories, with a white background and a minimum of 1000 pixels on the longest side for zoom functionality. Compress product images to quality 85–90 for maximum clarity at the zoom level. Use our "contain" resize mode to fit images within a specified dimension while preserving the aspect ratio.
Each social platform re-compresses uploaded images using its own algorithm — often aggressively. To minimise quality loss from double compression, upload images at quality 90+ and let the platform compress them. For Instagram, the optimal upload size is 1080×1080 for square, 1080×1350 for portrait. For X (Twitter), 1200×675 for landscape. For LinkedIn, 1200×628 for shared links. JPEG is the safest format for all platforms.
Email clients vary wildly in their image rendering capabilities. Always use JPEG for email images — it is universally supported. Compress email images to quality 70–75 since email clients typically display images at fixed small sizes where high-quality compression is invisible. For newsletter templates, keep all images under 100KB and test across major email clients including Gmail, Outlook, and Apple Mail.
WordPress automatically generates multiple image sizes when you upload media, but it cannot undo damage done by uploading already over-compressed images. The ideal workflow is to compress your images manually to the correct dimensions and quality before uploading. This prevents WordPress from double-compressing your images and gives you full control over the output. Many modern WordPress setups also support WebP — check whether your theme and hosting environment support it before converting.