Free browser-based image tool

Image Compressor Online

Compress images online for free to reduce JPG, PNG and WebP file size while keeping good visual quality. Preview the result, choose output format, resize large images and download the optimized file for websites, email, social media and faster uploads.

Browser-basedFree image compressorSupports JPG / PNG / WebPPreview before downloadNo signup

Privacy-friendly design: This image compressor is designed for browser-based processing, so it avoids unnecessary upload delay. Your original image remains unchanged and a new compressed image is created for download.

Compression Controls

Upload an image, choose compression settings, preview the optimized result and download the smaller file.

Drag and drop an image here

Supports JPG, PNG, WebP, GIF and BMP up to 25 MB

Compression preset

Output format

Best for photos and screenshots without transparency.

Quality (75%)

Lower quality usually means a smaller file size.

Maximum width

Large images can be resized down to reduce file size.

Keep original dimensions

JPG background color

Used when exporting JPG because JPG does not support transparency.

Output file name

Correct extension is added automatically based on output format.

Source format: -

Output format: JPG

Compression mode: Balanced compression

Preview

Compare the original image with the compressed output before downloading.

Original

Upload an image to preview it here.

Compressed output

Compress your image to preview the result here.

Source file

Compressed file

Source size

Output size

Compression tips

WebP often gives the best balance of small file size and strong visual quality.
JPG works well for photos and screenshots where transparency is not needed.
Reducing very large image dimensions can significantly lower file size without noticeably hurting web display quality.
PNG is useful for transparent graphics, but it may be larger than JPG or WebP.

How to compress an image online

Upload image

Select or drag and drop a JPG, PNG, WebP, GIF or BMP image into the upload area.

Choose compression preset

Pick light, balanced, strong or custom compression depending on whether you prefer quality or smaller file size.

Select output format

Choose JPG, PNG or WebP output. WebP is often best for small web images, while JPG is useful for photos.

Adjust size and quality

Set quality and maximum width if you want to reduce large images while keeping the aspect ratio.

Preview and download

Compare the original and compressed image, then download the optimized file.

For most images, start with Balanced compression. Use Strong compression when you need the smallest possible file for online forms, job portals or email attachments. Use Light compression when image clarity matters more than file size.

WebP usually gives a very good size-quality balance for websites. JPG is useful for photos and screenshots without transparency. PNG is better when you need transparency or sharper graphic elements.

Compress images for websites

Reduce image file size before uploading to blogs, landing pages, product pages and portfolios. Smaller images can improve page load speed and user experience.

Reduce image size for email and forms

Compress large screenshots, photos, scanned images and documents before attaching them to email or uploading them to forms and online portals.

Convert and optimize output format

Export compressed images as JPG, PNG or WebP depending on your use case. WebP is ideal for modern websites, JPG for photos and PNG for transparency.

Best use cases

Compress product images for ecommerce listings.
Reduce screenshots and photos before email sharing.
Optimize blog and website images for faster loading.
Make images smaller for online forms and portals.
Compress social media images before uploading or sharing.
Convert large PNG files to smaller JPG or WebP outputs.

Image compression tips

Use WebP for a strong balance of quality and small size.
Use JPG for photos where transparency is not required.
Use PNG when transparency or sharp graphics are important.
Reduce maximum width for very large camera photos.
Preview the output before using it for important work.
Use original dimensions only when exact size must be kept.

Important note

Lower quality settings create smaller images but may reduce visual clarity. Review the compressed image before sharing it, uploading it to a website or using it for official submissions.

The original file remains unchanged. Some animated GIFs may be loaded as a still frame depending on browser canvas support. Very large images may process more slowly on low-memory devices.

Image Compressor FAQ

Is this image compressor free to use?

Yes. SmartTools Image Compressor is free to use online for reducing JPG, PNG and WebP file size.

Does this tool upload my image to a server?

The tool is designed for browser-based processing, so your image can be compressed directly in your browser without unnecessary upload delay.

Which image formats are supported?

You can upload common image formats such as JPG, PNG, WebP, GIF and BMP, and export optimized output as JPG, PNG or WebP.

Which output format should I choose?

Use WebP for small web-friendly images, JPG for photos and screenshots without transparency, and PNG when you need transparency or sharper graphics.

Will image quality reduce after compression?

Lower quality settings create smaller files but may reduce visual clarity. Balanced compression is a good starting point for most images.

Can I resize the image while compressing?

Yes. You can set a maximum width to reduce large images while keeping the aspect ratio, or keep original dimensions if you only want format/quality compression.

Can I rename the compressed image?

Yes. You can set an output file name before downloading the compressed image.

Will the original image change?

No. The original image remains unchanged. The tool creates a new compressed image file for download.

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