Free Image, PDF & Developer Tools
Need a folder or a zip of up to 100 images? Bulk Image Compressor
More MiniFy tools
Image, PDF, and developer tools run in your browser. Nothing is uploaded.
- PDF ToolsFree online PDF tools for compressing, converting, merging, splitting and editing PDF files. Nothing is uploaded.
- Developer ToolsFree online developer tools for formatting, validating, converting and encoding data. Nothing is uploaded.
- Image CompressorCompress PNG, JPG, and WebP images in your browser. Adjust quality, convert formats, or aim for a target size. Nothing is uploaded.
- Bulk CompressCompress up to 100 PNG, JPG, or WebP files in your browser, keep folders, and download one zip. Nothing leaves your device.
- Image ResizerCrop, rotate, straighten, and scale PNG, JPG, and WebP in your browser. Auto crop and smart crop stay on your device.
- Edit ImageEdit photos in your browser: filters, adjust, beauty, frames, text, and on-device background removal. Nothing is uploaded.
Guides and comparisons
Practical how-tos and format comparisons that link to the matching MiniFyPNG tools.
- How to Compress PNGLearn how to reduce PNG file size in your browser with MiniFyPNG, including transparency tips and realistic expectations.How-to
- How to Compress JPGLearn how to shrink JPG and JPEG files with quality control in your browser using MiniFyPNG.How-to
- Reduce Image SizePractical ways to make images smaller: compress PNG/JPG/WebP, resize dimensions, or aim for a target size — all in your browser.How-to
- Compress to 100 KB GuideHow MiniFyPNG searches toward a 100 KB target, what success looks like, and what to do when an image cannot get that small.How-to
- PNG vs JPGCompare PNG and JPG for transparency, photos, graphics, and file size — then open the matching MiniFyPNG compressor.Comparison
- PNG vs WebPCompare PNG and WebP for transparency and size, and learn when converting PNG to WebP helps.Comparison
- JPG vs WebPCompare JPG and WebP for photos and web delivery, and convert JPG to WebP in your browser when you want a smaller file.Comparison
How it works
Every file is shown as a bar whose width is its byte size — the same idea, live in the tool, and here as a worked example.
- 1
Drop in your image
PNG, JPG or WebP, read the moment it lands — dimensions and exact byte size shown immediately, before anything is processed.
- 2
Set a quality or a target
Pick a quality level, or aim for an exact size (10 KB up to 1 MB). Every byte is measured, never estimated.
- 3
See the real delta
Original and compressed are shown as proportional weight bars — the width is the file size, not a decoration.
Example — not your file
1.38 MB → 304.7 KB · −78.5%
Supported today
Static PNG, JPG and WebP. Animated PNG and GIF are detected and rejected with a clear message — not silently flattened to one frame.
Limits
25 MB per file, 20 files per batch on this page. Bulk Compress accepts up to 100 files and a 250 MB batch, then downloads a zip.
Privacy
Images are processed in your browser and are not uploaded anywhere for this tool. We don't control what your browser or extensions do outside that — so this is a description of what MiniFy does, not an absolute guarantee.
Frequently asked questions
Are my images uploaded anywhere?
No — the compression tool runs entirely in your browser using the File and Canvas APIs. Your images never leave your device for this tool.
Why is PNG harder to shrink than JPG?
PNG is a lossless format, so most of the size reduction has to come from either reducing the color palette or re-optimizing how the image is filtered and compressed — not from simply re-saving it, which often makes PNGs larger, not smaller.
What happens to transparency if I convert to JPG?
JPG has no alpha channel, so transparent areas are filled with a solid matte color before conversion. You'll be able to choose that color, defaulting to white, and you'll see it before it happens.
Can I hit an exact file size every time?
Target size uses a bounded search over quality (and, if needed, dimensions) to get as close as possible. It's not guaranteed for every image — we'll always show you the closest size actually achieved, never a false success.
How do I compress a whole folder?
Use Bulk Image Compressor. It accepts a folder or up to 100 PNG, JPG, and WebP files, compresses them with one set of settings, and lets you download a zip — still entirely in your browser.