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Image Compressor with Live Preview in Browser

Upload image to compress JPG, PNG, WebP, or AVIF for social media or web, smaller files in seconds.

or drop the image here

Quick answer

Compress image online free, right in your browser, for social media uploads, web pages, email attachments, or a profile picture upload. Drop a JPG, PNG, WebP, or AVIF image onto the page and the preview updates instantly in your browser, every slider move is local with no network. When you click Download, the file is sent over HTTPS to our compression service, a professional-grade cloud step, the same kind of stack large platforms use. The cloud step produces files 10 to 15 percent smaller than the browser preview at the same quality setting. Files are kept only briefly, then removed. The tool accepts files up to 25 MB on the cloud lane. It works best for photographers, developers, and product teams who need smaller files without switching software or opening an editor.

Open the compress image tool
How to compress image online in your browser

How to compress image online in your browser

Upload image and the tool takes it as JPG, PNG, WebP, or AVIF and makes a smaller copy. Lossy formats get re-compressed at the quality level you pick. Lower quality means smaller file, until visible artifacts appear. You watch the live split-view preview and the live file-size counter as you drag the slider, so you can pick the lowest quality that still looks right. Output keeps the original dimensions. To reduce pixel size too, use the Resize tool first.

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How privacy works on this free online compress image tool

How privacy works on this free online compress image tool

The slider preview is rendered locally in your browser, every adjustment is computed inside your browser, no roundtrip. The final download is different: when you click Download, the file is sent over HTTPS to our professional-grade cloud step for the smallest output. The file is kept only briefly, then removed. We never use uploaded files for training and never share with third parties. For files larger than the upload cap, the tool automatically falls back to the in-browser path.

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What this compress image tool is and is not

What this compress image tool is and is not

Free online with no watermark on the output. The download path needs network: the cloud step does the final compression. If the network is offline, the tool falls back to the in-browser path automatically. What it does not do: resize (use Resize first to go from 4000 to 1200 px). It does not preserve EXIF, GPS, or camera metadata, the tool strips it by default for a privacy win. PNG output preserves any transparent background pixels. No batch: one image at a time. No target-size mode.

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Live format comparison, pick the smallest in one glance

Live format comparison, pick the smallest in one glance

Drop image once and the tool shows three cards simultaneously with byte counts: JPG, WebP, AVIF. WebP is typically 25 to 35 percent smaller than JPG at equivalent quality. AVIF is typically 40 to 60 percent smaller than JPG, but AVIF takes longer to build (about 3 to 8 seconds on the cloud lane). PNG uses lossless palette reduction. The slider controls palette depth, not perceptual quality. Browser support is universal for JPG, PNG, WebP since 2020, AVIF since 2023. Mention support in your social media or web context.

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How it works: live preview in your browser, final file from the cloud

How it works: live preview in your browser, final file from the cloud

The slider preview runs locally so the editor stays snappy. The Download path sends your file to our compress service for a cloud step that beats the browser by 10 to 15 percent at the same quality setting. If the network is offline or the file exceeds the upload cap, the tool falls back to the in-browser path automatically. Same UX, slightly larger file. You can verify the lane that ran by checking the Network tab in DevTools after Download.

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Pick your output format: JPG, WebP, AVIF, or PNG

Pick your output format: JPG, WebP, AVIF, or PNG

Pick output on the done screen. JPG is the smallest for photographs without a transparent background. WebP saves 25 to 35 percent vs JPG at the same visual quality and supports transparency. AVIF saves 40 to 60 percent but takes longer to build. PNG is the right pick for screenshots, logos, or images with transparent areas. The slider tunes palette depth instead of perceptual quality. Default output format matches your input format so you do not have to think about it.

How it works

  1. Upload image

    Open the tool and drop a JPG, PNG, WebP, or AVIF file onto the upload area, or click to browse for the file on your device.

  2. Choose output format

    Click JPG, WebP, AVIF, or PNG to set the output. WebP is the default and is usually the smallest for photos going to the web.

  3. Drag the quality slider

    Watch the byte counter update as you move the slider. Stop when the file size is small enough and the preview still looks right to you.

  4. Click Download

    The file is sent to our cloud step for high-efficiency compression. Output is typically 10 to 15 percent smaller than the preview shown in the browser.

Want to crop, resize, or change format first?

Compress changes the file size only. To frame a specific area use Crop image. To reduce pixel count before compressing use Resize.

Crop image Resize image

Frequently asked questions

How to compress image online?

Upload image to the compress tool, pick output format (JPG, WebP, AVIF, or PNG), drag the quality slider while watching the byte counter, click Download. Compression runs free online, the preview is in your browser. A typical compress from upload to download takes under five seconds on a modern device. The image compressor is free with no watermark.

Why compress images for social media or web?

A typical unoptimized phone photo is 4-6 MB. At quality 78, the same photo re-compressed by the cloud step is usually 800 KB to 1.5 MB, small enough for email attachments, WhatsApp sharing, social media uploads, and web hero images without noticeable visual loss. Compressed images also load faster, improving Core Web Vitals scores.

How do I compress an image without losing quality?

For truly lossless compression, choose PNG as your output format. The PNG path uses palette reduction, shrinking unoptimized PNGs by 30-50% with zero perceptual difference. For lossy formats (JPG, WebP, AVIF), quality 80 is the practical threshold where most viewers cannot spot the difference, though results depend on image content.

Can I compress to a specific file size like 100 KB?

The tool does not have a target-size mode, but hitting a target is straightforward with the live byte counter. Drag the slider down until the counter reads your target, then click Download. Two or three slider adjustments typically get you within 10% of any target size for upload image flows.

Which format is smallest for social media: JPG, WebP, or AVIF?

It depends on image content. The tool shows all three simultaneously with their byte counts so you can compare on your actual file. Rule of thumb: WebP is typically 25-35% smaller than JPG at the same quality. AVIF is 40-60% smaller than JPG, though it takes a few extra seconds to build. PNG is right when you need a transparent background or a profile picture with alpha.

Does compressing an image reduce its dimensions?

No. Output dimensions are identical to input. Compressing changes only the file size, not the pixel count. If you also need to reduce resolution (4000 px to 1200 px), use the Resize tool first, then compress the resized file. That order gives the smallest final file size.

The details

Notes from the team on craft, formats, and the small decisions behind a good round crop.

The two lanes explained
The slider preview and the Download are two separate code paths. The preview is built locally by the browser. Every move of the slider rebuilds the preview at the new quality value. This is fully local: verify by opening DevTools Network filter "compress", zero requests appear during slider interaction. The Download triggers a different path: it sends the original file to our cloud service for the final compression. The result returns in the response.
Why the cloud lane beats the browser
The browser's built-in JPEG path lacks the chroma subsampling tuning of a dedicated cloud lane. The cloud lane focuses on smaller files at the same perceptual quality. In benchmarks across 50 diverse photos, the cloud lane at quality 78 produced files 10 to 20 percent smaller than the browser at the same quality value. For PNG the gap is larger, because the cloud lane applies palette reduction the browser does not.
AVIF: what it is and when to use it
AVIF is based on the intra-frame prediction of the AV1 video codec, an open, royalty-free standard. It achieves better compression efficiency than JPEG by predicting pixel values across larger regions and representing the residual more compactly. The practical result is that AVIF files at quality 60 are often visually indistinguishable from JPEG files at quality 80, while being 40 to 60 percent smaller. The tradeoff is build time, on the cloud lane an 8 MP photo at quality 60 takes 3 to 8 seconds. Browser support is strong as of 2026 across all major engines.
Quality settings in practice
The slider maps directly to the quality parameter for lossy formats. At 80, the setting matches what Adobe Photoshop labels High when exporting JPEG, the default used by most professional workflows. At 60, an average 4 MP photo compresses to roughly 200-400 KB, small enough for most email and web use. Below 50, block artifacts begin appearing on smooth gradients and skin tones at normal viewing distance on a retina screen. Below 30, output is recognizable but clearly compressed, appropriate for thumbnail previews only.
Metadata stripping and why it matters
Both lanes strip EXIF, GPS, and camera metadata from the output by default. This is the default behavior of the cloud lane. This removes potentially sensitive location data embedded by smartphone cameras, a privacy benefit for images shared publicly on social media or any web context. Second, it slightly reduces file size (a typical EXIF block is 10-40 KB). The visual orientation tag is handled separately: the tool reads the EXIF orientation field before stripping and pre-rotates so the output is correctly oriented.
Supported formats: what goes in, what comes out
Input accepts JPG, PNG, WebP, and AVIF on every modern browser, validated by magic-byte sniff. GIF is accepted in Chrome and Firefox but only the first frame is processed. HEIC from iPhones works in Safari, which has a native HEIC decoder built in. Output can be JPG, PNG, WebP, or AVIF regardless of input, so you can also use this tool as a one-step convert-and-compress path. The cloud lane accepts files up to 25 MB. Files above that cap are processed by the in-browser path instead with a slightly larger result.