Compress, Resize & Convert Images Online — Free Batch Image Toolkit
Compress images to a target size, resize dimensions, crop, apply filters, and convert between PNG, JPEG, WebP, and AVIF — for dozens of images at once — with this free online image toolkit. Powered by the same Squoosh codecs used by Google, it delivers maximum compression with minimal quality loss, entirely in your browser: your photos are never uploaded to any server.
Unlike single-file compressors, this toolkit is built for batches. Drop in an entire folder of photos, apply the same compression, resize, or format conversion to all of them, and download everything as a single ZIP. Whether you need to compress a JPEG to 100KB for a form upload, convert a product catalog to WebP for faster page loads, or resize a set of screenshots, it happens in one pass.
How to Compress and Convert Images Online
-
Add your images
Drag and drop one image or a whole batch — PNG, JPEG, WebP, and more are supported.
-
Choose your operations
Set compression quality, resize dimensions, crop, apply filters, or pick a new output format (WebP, AVIF, JPEG, PNG, or Base64).
-
Process the batch
Every image is compressed and converted locally with Squoosh codecs — watch the size savings per file.
-
Download as ZIP
Grab individual files or export the entire processed batch as one ZIP archive.
Key Features of the Image Toolkit
-
True batch processing
Compress, resize, and convert dozens of images in one pass with a single ZIP download — no one-file-at-a-time tedium.
-
Squoosh-grade compression
MozJPEG, OxiPNG, WebP, and AVIF codecs squeeze maximum savings while preserving visual quality.
-
100% private — no uploads
All processing runs in your browser via WebAssembly. Personal photos and client assets never leave your device.
-
Modern format conversion
Convert PNG/JPEG to WebP or AVIF and typically cut file sizes 30–70% for dramatically faster pages.
-
Crop, resize, and filter
Adjust dimensions for social media or email, crop to aspect ratios, and apply visual filters before export.
-
Base64 export
Turn small images into data URIs for embedding directly in CSS and HTML.
Compress Images to 100KB, 50KB, or Any Target Size
Many portals — job applications, government forms, visa systems, university admissions — enforce strict upload limits like 100KB, 50KB, or 20KB. To hit a target size, lower the quality slider and watch the live output size per image; combining moderate resizing with JPEG or WebP compression reaches even aggressive targets while keeping documents and photos legible.
Because processing is local and batched, you can bring a whole set of documents to the required size in one pass instead of compressing them one by one on upload-limited websites.
Convert Images to WebP and AVIF for Faster Websites
WebP and AVIF are the modern web's image formats: at comparable visual quality they are typically 25–50% (WebP) to 50%+ (AVIF) smaller than JPEG. Smaller images mean faster Largest Contentful Paint, better Core Web Vitals, and improved SEO. Convert your entire media folder in one batch and ship lighter pages today.
Frequently Asked Questions
How do I compress an image to 100KB?
Add the image, lower the quality setting until the live output size reads at or under 100KB, and download. For large photos, resizing the dimensions first (e.g. to 1200px wide) makes the target much easier to hit without visible quality loss.
Can I compress multiple images at once?
Yes — batch processing is this toolkit's specialty. Drop in dozens of images, apply the same settings to all of them, and download the entire result as a single ZIP file.
Are my images uploaded to a server?
No. Every operation — compression, resizing, conversion — runs locally in your browser using WebAssembly codecs. Your images never leave your device, making the tool safe for private photos and confidential documents.
Which format should I choose: JPEG, PNG, WebP, or AVIF?
Use JPEG for photos with broad compatibility, PNG for graphics needing lossless quality or transparency, WebP for the best size/compatibility balance on the modern web, and AVIF for maximum compression where cutting-edge browser support is acceptable.
Does compressing an image reduce its quality?
Lossy compression trades some fidelity for size, but Squoosh codecs are engineered to discard only what the eye barely notices. At quality 75–85, most photos are visually indistinguishable from the original at a fraction of the size.
Is there a limit on file size or number of images?
There are no artificial limits — since processing happens on your machine, capacity depends only on your device's memory. Typical batches of dozens of photos process smoothly.