ImageLean
No upload required Browser-based Local processing 1 formats

Compress JPG Online

Optimize JPG and JPEG files in your browser. JPG remains the default output unless you switch formats manually.

Compression Settings

Lower quality = smaller file size

File sizes use KiB (1,024 bytes) and MiB. Target sizes are best effort and may not be reached.

Processing and limitations

Compare

ImageTiny app icon

ImageTiny

Compress + batch

Need faster photo compression on iPhone?

ImageTiny handles on-device compression, crop, resize, format conversion, and EXIF cleanup, with batch processing for up to 200 photos.

On-device Batch 200 Privacy-first
Download on App Store

Best for common iPhone photo workflows like HEIC, JPG, PNG, and WebP.

Related Tools

4
Compress JPG to 200KB Reduce JPG size to a target limit while keeping a JPG-first workflow. Compress JPG to 100KB Reduce JPG size to a target limit while keeping a JPG-first workflow. Compress JPG to 50KB Reduce JPG size to a target limit while keeping a JPG-first workflow. Compress JPG to 20KB Reduce JPG size to a target limit while keeping a JPG-first workflow.

Compress JPG Online and Reduce JPG Size Fast

Choose this page when your main task is to compress JPG online, reduce JPG size, or optimize JPEG files for email, web uploads, and content management systems.

JPG is the most common format for photos, so a dedicated JPG compressor helps you keep a familiar output workflow while making files easier to upload and share. You can stay in JPG or switch to another format only if you want even smaller files.

Reduce JPG Size for Uploads

Compress JPEG online before sending product photos, article images, camera exports, or email attachments that are too large.

Keep JPG Output by Default

This page is optimized for users who specifically want a compress JPG workflow without changing away from JPG unless necessary.

Batch Compress JPEG Files

Upload multiple JPG images, reduce JPG size in one session, and download the optimized files individually or as a ZIP.

Processing and limitations

Compression may reduce image quality or dimensions. Compare the result before downloading. Animated GIFs retain animation only with GIF output.

File sizes use KiB (1,024 bytes) and MiB. Target sizes are best effort and may not be reached.

W3C PNG Google WebP

Compress Image Online Without Uploading

100% Client-Side

All processing happens directly in your browser. Your images never leave your device.

Batch Image Compression

Reduce image file size for multiple images at once, then download each file or a ZIP.

Adjust Compression Level

Control the compression level to balance visual quality and file weight.

JPG, PNG, WebP, GIF

Compress images across the most common web image formats.

How to Reduce Image File Size Online

1

Upload

Upload or paste the image you want to compress online.

2

Configure

Adjust quality, width, or height if you want to reduce image size more aggressively.

3

Compress

Click "Compress" to compress image size in your browser.

4

Download

Download the optimized image with a smaller file size.

Frequently Asked Questions

This tool compresses image online inside your browser, so your files stay on your device while you reduce image size and reduce image file size.

Yes. You can adjust quality and dimensions to compress image size while keeping a strong visual result for web, email, and documents.

You can compress image online for JPG, PNG, WebP, GIF, and HEIC files.

Yes. Batch mode lets you reduce image size online for multiple files and download them one by one or as a ZIP.

A quality setting around 75-85 usually gives a good balance between visual clarity and smaller file size for web publishing.

Start by lowering quality first. If the file is still too large after reaching quality 60, then try reducing dimensions as well.

Yes. HEIC input is supported. The tool can convert and compress HEIC files to JPG, WebP, or other formats directly in your browser.

Below 100% quality, color quantization changes pixels. At 100%, PNG encoding is lossless; resizing still changes pixels and metadata may be removed. Output is an 8-bit still PNG: APNG animation and 16-bit depth are not preserved. If the optional encoder fails, browser export may be larger. Compare the preview, dimensions and actual file size.

PNG compression: quality and transparency

PNG is a lossless file format, but reducing its colour palette before encoding changes pixels. This tool uses colour quantisation below 100% quality. At 100% it uses lossless PNG encoding; resizing still changes pixels. Metadata may be removed. This browser workflow outputs 8-bit still PNG images; APNG animation and 16-bit channel depth are not preserved. If the optional encoder fails to load, browser PNG export may produce a larger file. Compare the preview, dimensions and measured file size before downloading. For an English–French product label, inspect accented characters and small bilingual text after colour reduction. Transparent edges and pixel dimensions should be checked in the actual downloaded image, not inferred from a percentage saving.

PNG format specification

Last updated: October 11, 2026

References & Resources

Authoritative specifications and references for the file formats this tool works with.

JPEG - Wikipedia

How DCT-based JPEG compression works, from quality scaling to chroma subsampling.

Independent JPEG Group (IJG)

The reference JPEG implementation maintained by the IJG.