Is this image compressor free?

Yes, Compro is completely free with no limits, no account, and no watermarks. All image processing happens in your browser so your files never leave your device.

What image formats does Compro support?

Compro supports JPEG (.jpg, .jpeg) and PNG (.png) input formats. All output is saved as optimised JPEG for maximum compression efficiency.

Can I compress an image to a specific file size?

Yes. Switch to Target KB mode and type any size — for example 50, 100, or 200 KB. Compro will automatically iterate quality levels and downscale dimensions if needed to reach your exact target.

Can I use Compro on my phone?

Yes. Compro is fully mobile-friendly and works on all smartphones and tablets. You can also install it as a PWA (Progressive Web App) from your browser to use it like a native app, even offline.

Compro — Free Image Compressor | Compress Image to 50KB Online

01 — Upload No file selected

Drop an image here

JPEG or PNG — stays in your browser, never uploaded to any server

Browse File

Reading image…

02 — Settings

Target File Size

Binary-search iterates quality & auto-downscales dimensions if needed.

Resize (optional)

Width (px)

Height (px)

Lock aspect ratio

Compressing…

Original

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Compressed

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Reduction

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Format

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Original —

Compressed —

Why Use Compro to Compress Images?

Compro is a free, browser-based image compression tool that reduces JPEG and PNG file sizes without quality loss — instantly, privately, with no uploads required.

🎯 Compress to Exactly 50 KB

Set 50 KB as the target and Compro automatically finds the perfect quality level. Ideal for passport photos, ID uploads, job applications and government forms that require images under 50 KB.

🔒 100% Private — No Uploads

Unlike other online image compressors, Compro never sends your files to any server. All compression happens inside your browser using the HTML5 Canvas API. Your images are yours alone.

⚡ Smart Binary-Search Algorithm

Most compressors just apply a fixed quality. Compro uses a binary-search loop to find the highest possible quality that still hits your target size — giving you the best-looking result every time.

📐 Resize Before Compressing

Set exact pixel dimensions and lock your aspect ratio — all before compressing. Fewer pixels means smaller file sizes without extra quality loss.

📱 Works on Mobile & Tablet

Fully responsive and touch-friendly. Compress images directly from your iPhone, Android phone or tablet. Install as a PWA for one-tap access and offline use — no app store needed.

📅 Free Forever, No Limits

No file size limits, no daily quotas, no watermarks, no account required. Compro is completely free for unlimited use. Compress as many images as you need, whenever you need.

How to Compress an Image to 50 KB

Reduce your image file size in four simple steps — no software to install, no account to create.

Upload your imageClick "Browse File" or drag and drop a JPEG or PNG onto the upload area. Your image loads instantly — nothing is sent to any server.

Set your target (default: 50 KB)The tool defaults to 50 KB. Change the number to any size — 100 KB, 200 KB, or use the Quality % slider for manual control.

Click CompressThe smart algorithm runs in your browser, iterating quality levels and auto-scaling dimensions until your target size is reached.

Download your compressed imageClick Download to save the compressed JPEG to your device. The before/after size and reduction percentage are shown instantly.

Frequently Asked Questions

Everything you need to know about compressing images online.

How do I compress an image to 50KB online for free? +

Upload your JPEG or PNG to Compro, ensure the Target KB field shows 50, and click Compress. The tool automatically finds the optimal quality and resizes if needed to get your image under 50 KB — entirely in your browser, completely free with no signup.

Does compressing an image reduce its quality? +

JPEG compression always involves some quality trade-off, but Compro minimises this by using a binary-search algorithm to find the highest quality level that still meets your target file size. For most images the quality difference is barely visible at 50 KB.

Is my image uploaded to a server? +

No. Compro processes all images entirely inside your browser using the HTML5 Canvas API. Your files never leave your device and are never sent to any server, making it the most private image compressor available online.

What image formats are supported? +

Compro accepts JPEG (.jpg, .jpeg) and PNG (.png) files as input. All output is saved as optimised JPEG for maximum compression. PNG files are automatically converted to JPEG during compression.

Can I compress images on my phone? +

Yes. Compro is fully optimised for mobile devices including iPhone and Android. The interface is touch-friendly with large tap targets. You can also install it as a PWA (Progressive Web App) for instant offline access directly from your home screen.

Is there a file size or usage limit? +

No limits at all. Compro is free to use with no file size cap, no daily limit, no account and no watermarks. The only practical limit is your device's RAM, which handles most photos easily.

Can I compress an image to a specific KB other than 50? +

Absolutely. Just change the number in the Target KB field to any size you need — 20 KB, 100 KB, 200 KB, 500 KB — and Compro will compress to that exact target. You can also switch to Quality % mode for manual quality control.

Compress Image to 50KB.Free, Private & Instant.