Compression runs entirely in your browser with the Canvas API—images are never uploaded to EverydayTools servers.
Set a target file size and compress up to 20 images to that exact byte cap—ideal for portals, email limits, and uploads. For quality-based compression without a fixed cap, use Image Compressor.
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Enter any number in the target field and choose KB or MB, or tap a preset (50 KB, 100 KB, 1 MB, etc.). The tool shows the exact byte target before you compress and binary-searches quality to match within about 2%.
Set the unit to MB and value to 1 (or use the 1 MB preset). Output stays within about 2% of 1 MB. Works for JPG, PNG, and WebP. Processing runs in your browser with no upload.
Set a KB/MB target; the tool minimizes quality loss while hitting the size. For much smaller files, choose Convert to JPEG or WebP and set a background color for transparent PNGs.
Yes. Add up to 20 images and reduce them to the same target in one run. Use Download all as ZIP for a single archive. All processing stays local in your browser.
Yes. No images are sent to any server. Your files never leave your device. No data is stored or logged.
The browser Canvas API binary-searches JPEG/WebP quality to meet your exact KB or MB target. PNG may be downscaled or converted. Optional format conversion can produce much smaller files than lossless PNG alone.
A compressor typically uses a quality percentage. A size reducer hits an exact target (100 KB, 200 KB, 1 MB)—ideal for forms and platform rules. For general compression without a byte cap, use Image Compressor.
Yes. Choose Convert to JPEG or Convert to WebP under Output format. Set a background color for transparent PNGs (e.g. white) before converting.
This tool primarily reduces file size via quality and encoding—not by resizing width/height. If you need smaller pixels, use Image Resizer first, then reduce to your KB/MB target here.
Yes for lossy JPEG/WebP—always compress from the original, not from an already-compressed copy.
Browsers have limited HEIC support. Convert to JPEG on the device (Settings → Camera → Most Compatible) or use HEIC to JPG, then set your KB/MB target here.
Image Size Reducer — Compress Images to an Exact KB or MB Target (/image-size-reducer) runs in your browser when supported—inputs are not uploaded to EverydayTools servers.
Reported sizes are the byte length of generated blobs. “At target” means within about 2% of your KB/MB setting unless best-effort mode applies.
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Reviewed by EverydayTools Editorial Team on 2026-05-20.
Drag & drop or click to upload
JPG, PNG, WebP · Max 50MB per file · Up to 20 files
JPG, PNG, WebP · processed locally in your browser
Metadata (EXIF) is removed in the output for privacy and smaller file size. Orientation is auto-corrected.
Start from the original file, resize to the portal’s required dimensions first, then set a KB/MB target here—not a guess with a quality slider. For photos, JPEG or WebP at the highest quality that still meets your byte cap usually looks best. Avoid re-compressing an already-compressed JPEG.
Upload the image, set the target to 100 KB, and click Reduce. This tool binary-searches encoding quality until output is within about 2% of 100 KB. For a 100 KB–focused workflow with form-specific tips, use the dedicated Compress Image to 100KB tool.
Resizing changes pixel dimensions (width × height). Compressing changes how pixels are encoded (quality, format) without necessarily changing dimensions. Portals with byte limits need compression; portals with dimension rules need resizing first—then compression if the file is still too large.
For photographs, JPEG or WebP usually yields the smallest files at acceptable quality. WebP often beats JPEG by 25–35% at similar appearance. PNG is larger but supports transparency. AVIF can be smaller than WebP but has weaker browser support for editing and uploads.
| Format | Compression type | Typical size | Transparency | Best use |
|---|---|---|---|---|
| JPEG | Lossy | Smallest for photos | No | Portraits, forms, email attachments |
| WebP | Lossy or lossless | Often 25–35% smaller than JPEG | Yes (lossy) | Web images, modern uploads |
| PNG | Lossless | Largest for photos | Yes | Logos, screenshots, flat graphics |
| AVIF | Lossy or lossless | Often smaller than WebP | Yes | Next-gen web; limited upload support |
This tool uses the browser Canvas API to re-encode images locally. It is not a cloud encoder like TinyPNG—your files stay on your device.
Last reviewed 2026-05-20. Need to change dimensions first? Image Resizer.