Free online image compressor

ImageCompressify shrinks your photos and graphics to an exact file size while keeping them looking sharp. Pick a target size below, or choose a use case, upload your image, and download the optimized result in seconds. Everything runs privately — your images are processed in memory and never stored.

What is image compression?

Image compression reduces the file size of a picture by storing it more efficiently. Lossy compression (used by JPG, WebP, and AVIF) discards information the eye barely notices to achieve much smaller files, while lossless compression (used by PNG and lossless WebP) keeps every pixel but saves less space. For most photos, lossy compression at a good quality setting is invisible to the eye yet cuts the file size by 60–80%. Compression is the single most effective way to make images load faster online, fit under upload limits, and take up less storage — without changing what the image looks like to a viewer.

How to choose the right target size

The right size depends on where the image is going. For small, repeated elements like avatars, icons, and thumbnails, 20–50KB is plenty. For in-content web and blog images, around 100KB keeps pages fast while looking sharp, and 200KB suits larger or more detailed photos. Hero banners and high-detail photography can go up to 500KB. For email attachments and presentations, 1MB keeps images detailed yet easy to send, while 2MB and 5MB are for print and professional-quality work. When in doubt, start smaller — you can always go larger if the result looks soft.

Which format should you compress to?

Format matters as much as size. WebP is the best all-round choice for the web: it’s 25–35% smaller than JPG at the same quality and supports transparency. AVIF is even smaller and ideal for large images on modern browsers. JPG remains the safest, most compatible option for photos you’ll share or email. PNG is best for graphics, screenshots, and logos with text or transparency. You can convert to any of these while you compress, so a heavy PNG photo can become a tiny WebP, or an iPhone HEIC can become a universal JPG, in a single step.

How ImageCompressify hits an exact size

When you set a target file size, ImageCompressify doesn’t just guess a quality level. It runs a binary search across quality settings — repeatedly testing and narrowing in — to find the highest quality that still fits within your limit. That means you get the best-looking image possible for your chosen size, automatically, without trial and error. You can combine a target size with a format change and a resize in the same job, so a single click can convert, shrink the dimensions, and hit a precise KB target all at once.

Free, fast, and private

Every tool here is completely free, with no signup, no watermark, and no limit on how many images you can process. Compression runs on a fast, multi-format engine, so even large files convert in seconds, and you can batch a whole folder and download the results as a ZIP. Crucially, your images are never stored: they’re processed in memory and discarded immediately, and EXIF metadata — including GPS location — is stripped by default. It works on any device, from a phone before you upload to a form, to a laptop preparing a catalogue of product photos.

Compress by use case

Different destinations call for different settings, which is why there are dedicated guides for the most common ones. Optimizing for social media means matching each platform’s display size so your posts survive their recompression; for email it means staying under attachment limits; for the web it means small WebP or AVIF files that help Core Web Vitals; for printing it means keeping resolution while trimming file size; for e-commerce it means sharp product photos that still load fast; and for documents it means light images that keep PDFs and slide decks easy to share. Pick the use case that matches your goal and you’ll get the recommended size, format, and step-by-step instructions for it.

Compress by Target Size

Compress by Use Case

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How do I compress an image online?

Upload your image, choose a target file size (or a quality level), and click Convert. ImageCompressify finds the highest quality that fits your target and lets you download the result instantly — no signup, no watermark.

Is image compression free?

Yes. ImageCompressify is completely free with no limits, no account, and no watermarks. You can compress as many images as you like.

Will compressing reduce image quality?

Our smart compression preserves as much visual quality as possible for your chosen target size. For web-sized images the loss is usually invisible; for very small targets, pick WebP or AVIF and resize the dimensions for the cleanest result.

Are my images uploaded or stored?

No. Images are processed in memory and returned immediately — never written to disk or stored. EXIF metadata (including GPS) is stripped by default for privacy.

What image formats can I compress?

JPG, PNG, WebP, AVIF, HEIC, TIFF, GIF, BMP, PSD and 40+ other formats. You can also convert to a different format while compressing.

Convert between formats with these free, instant tools.

Further reading