Resize Image to a Target File Size
Compress Any Image to Under 100KB, 200KB, 500KB or 1MB — Free, Private, No Uploads
Open Image Resizer — Target File Size
Upload your image and set a target size in KB or MB. The tool automatically finds the optimal compression to meet your limit.
When You Need to Hit an Exact File Size
Web & Email
- Compress images to under 200KB for email campaign compliance
- Reduce website images to under 100KB for Core Web Vitals
- Optimize blog thumbnails to meet CMS upload limits
- Compress newsletter images to stay under inbox attachment caps
Forms & Uploads
- Compress passport or ID photo to under 100KB for government forms
- Resize profile pictures to meet social media file size limits
- Reduce job application photos to form-specified KB limits
- Compress scanned documents to under 500KB for online portals
E-Commerce & Media
- Compress Shopify product images to meet 2MB platform limit
- Resize press release images to under 500KB for media kits
- Compress real estate photos to meet MLS listing file limits
- Optimize app store screenshots to stay within submission size caps
How to Compress an Image to a Specific File Size
Upload Your Image
Drop any JPG, PNG, WebP, or AVIF image into the resizer. No file size restrictions — the tool handles everything from small icons to large RAW exports.
Set Your Target Size
Enter the maximum file size you need — in KB or MB. The tool automatically adjusts quality and compression to hit that target while preserving as much visual quality as possible.
Download the Result
Download your compressed image instantly. If the target requires extreme compression, the tool warns you so you can adjust the target or accept the quality trade-off.
Compress Any Image to a Specific File Size — Free Online Tool
Many platforms, forms, and upload portals specify an exact file size limit for images — passport photos under 100KB, email attachments under 500KB, Shopify listings under 2MB. Hitting those targets manually by trial and error is slow and frustrating. PicsSizer's target-size compressor lets you set a specific KB or MB limit and automatically finds the optimal quality setting to produce an image that fits — without unnecessary degradation. The entire process runs inside your browser using JavaScript and the Canvas API. No image data leaves your device at any point.
How Target-Size Compression Works
The tool uses a binary search approach: it compresses the image at a starting quality, measures the resulting file size, and iterates up or down until the output falls within 5% of your target. For JPEG and WebP, this works by adjusting the encoding quality parameter. For PNG — a lossless format — the tool first tries WebP conversion (which is much smaller), then falls back to resizing dimensions if needed. The result is the highest quality version of your image that fits within the target you set.
Common File Size Targets and Their Use Cases
100KB is the standard limit for passport photos, visa applications, and government ID uploads worldwide. 200KB is the sweet spot for blog post thumbnails and email newsletter images. 500KB covers most e-commerce product photos and press release images while maintaining sufficient resolution for print. 1MB is the typical ceiling for Shopify listings, LinkedIn banner images, and high-resolution social media posts. Select the relevant target page below or use the resizer directly with a custom value.
Tips for Getting the Best Quality at Your Target Size
Start with the highest quality original you have — compression from a high-resolution source always produces better results than compressing an already-degraded file. If your target is very small (under 50KB) and your image is complex, consider cropping to the subject area first to reduce unnecessary background data. For images that must hit 100KB or less, WebP output typically achieves the target at noticeably higher visual quality than JPG at the same file size.
Target-Size Compression by Size
Jump directly to a dedicated page for your target file size limit.
Compress to 100KB
For passport photos, government ID uploads, and form submissions with a 100KB limit.
Compress to 200KB
For email images, blog thumbnails, and CMS uploads with a 200KB ceiling.
Compress to 500KB
For e-commerce products, press photos, and media kits with a 500KB limit.
Compress to 1MB
For Shopify listings, LinkedIn banners, and social posts under 1MB.
Frequently Asked Questions — Resize Image to Target File Size
Common questions about compressing images to a specific KB or MB limit