Vexluno

Image Compressor

Make JPG, PNG and WebP images smaller so they load faster, fit upload limits and take up less space. Add up to 100 images; each one is compressed on your device and you can compare the result before downloading.

Your images stay on your device. They are processed by your browser and never uploaded. How this works

JPG, PNG, WebP, up to 50 MB each. You can also paste an image.

How to compress an image

  1. Add your imagesChoose files, drag them into the box, or paste a screenshot. Compression starts right away.
  2. Adjust if neededQuality 80 suits most photos. Lower it for smaller files, then apply the new setting.
  3. Check the savingsEach file shows its old and new size. Use Compare to inspect quality.
  4. DownloadSave files one at a time, or use Download all for a single ZIP.

Why compress with Vexluno

Nothing leaves your device

Compression runs in your browser, so private photos and work documents are never uploaded.

Never bigger than before

If a file is already well optimized, you get the original back instead of a larger copy.

Smart PNG compression

PNGs are reduced to an optimised palette while keeping transparency, often halving their size.

Location data removed

Compressed files are saved without EXIF metadata such as GPS coordinates.

Supported formats

You can addJPG / JPEG, PNG, WebP
You getSame format as the original, or WebP or JPG if you choose
LimitsUp to 50 MB and 64 megapixels per image, 100 images per batch

Working with a single format? The JPG, PNG and WebP compressors have settings tuned for each one.

What image compression does

A digital image is a grid of pixels, and a 12-megapixel photo contains 36 million colour values. Stored raw, that would be around 36 MB. Image formats shrink this by describing the picture more efficiently. Compression is the process of finding that more efficient description.

Lossy and lossless compression

Lossless compression stores the image more efficiently without changing a single pixel, similar to a ZIP file. Decompressing it gives back exactly the original. PNG is a lossless format.

Lossy compression goes further by discarding detail that people are unlikely to notice, such as very subtle colour variation in a blue sky. JPG and WebP are lossy formats, and the quality setting controls how much is discarded. Lossy compression can make photos many times smaller than lossless compression can.

How each format is compressed

JPG

JPG splits the image into small blocks and simplifies the fine detail in each one. At high settings this is invisible; at low settings you may see blockiness and fuzzy halos around sharp edges, especially around text.

PNG

PNG is lossless, so re-saving it rarely saves much. Vexluno's Smart mode instead reduces the image to a carefully chosen palette of up to 256 colours, with subtle dithering to keep gradients smooth. Screenshots, logos, icons and illustrations usually look identical and shrink considerably. Photos saved as PNG are better converted to JPG or WebP.

WebP

WebP uses more modern techniques than JPG and is usually noticeably smaller at the same visual quality. It also supports transparency, which JPG does not. All current browsers display WebP.

How much compression is reasonable?

For most uses, these settings give a good balance:

UseSuggested quality
Photography portfolios, product detail shots85 to 90
Website and blog images75 to 82
Email attachments, chat, forms65 to 75
Thumbnails and previews60 to 70

Below about 50, artefacts become easy to see. If you still need a smaller file at that point, reduce the dimensions instead: halving the width and height cuts the number of pixels by three quarters.

Why image size matters for websites

Images are usually the heaviest part of a web page. Large images take longer to download, particularly on mobile connections, which delays the moment the main content appears. Google measures this as Largest Contentful Paint (LCP), one of the Core Web Vitals used to assess page experience.

Compressing images, serving them in WebP, and sizing them to the space they actually occupy are three of the most effective improvements you can make. The Image Optimizer does all three in one step.

Frequently asked questions

Why did one of my images not get smaller?

Images that were already compressed, or saved at a low quality, have little left to remove. When the compressed version would be the same size or larger, Vexluno keeps your original and labels it "Already optimized". Lowering the quality, converting to WebP, or resizing the image will usually still help.

What quality setting should I use?

Start with 80. It removes detail the eye rarely notices and usually gives large savings. Use 85 to 90 for images where fine detail matters, such as product photos, and 60 to 75 for thumbnails or email attachments.

Is it better to compress or to convert to WebP?

For websites, converting to WebP usually gives the smallest files at the same visual quality. If the image has to stay a JPG or PNG, for example for an upload form, compress it in its current format instead. You can choose either option in the Output format setting.

Can I compress an image to a specific size, like under 1 MB?

There is no target-size setting yet. Lower the quality step by step and apply it until the result is small enough. Reducing the dimensions with the Image Resizer is the most effective way to reach a strict size limit.

Will compressing again make the image even smaller?

Compressing a JPG or WebP again at the same quality saves little and slowly reduces quality. It is better to start from the original file and choose a lower quality once.

Image Resizer

Resize images by width, height, percentage, or preset dimensions.