File Compressor Logo FileCompressor.online
Easy Step-by-Step Guide

How to Use File Compressor

Follow these 5 simple steps to shrink any photo or document to the exact KB size you need. It is fast, free, and completely private.

No Files Leave Your Computer
Keeps Original Width & Height
100% Private in Your Browser
Step 01

Pick or Drop Your File

Start by choosing the image or document you want to shrink. You work on one file at a time so you have complete control over its size and quality.

  • Drag & Drop: Just drag your file into the dashed blue box.
  • Click to Browse: Click anywhere inside the box to pick a file from your computer or phone.
  • Paste from Clipboard: Press Ctrl+V (or Cmd+V on Mac) to paste an image directly.
File Compressor — Upload Box
CLICK OR DROP: Click inside this box to pick your picture

Drag & Drop your file here

or click to select File • Supports paste (Ctrl+V)

Step 02

Choose Your Desired File Size (in KB)

Type in how small you need your file to be. If an email, job application, or website asks for an image under 100 KB, just type 100.

  • Type your target: Enter any number in KB (for example: 50, 100, or 200).
  • Click the arrows: Use the small up and down arrows in the box to adjust by 5 KB.
  • Dimensions stay the same: The width and height in pixels will not change at all.
File Compressor — Control Center
ENTER TARGET SIZE: Type your desired KB number here
Enter Your Output Size
100 KB
Step 03

Click the Blue COMPRESS Button

Once your file is loaded and your size is set, click the big blue button. Everything happens right on your device in less than a second—no waiting in lines and no file uploads.

  • Super fast: It shrinks your file right inside your browser memory without uploading anywhere.
  • Gets the size right: The tool tunes the quality so your file fits right under your chosen KB limit.
File Compressor — Action Bar
CLICK HERE: Click the blue COMPRESS button to start
COMPRESS
Step 04

Compare Before & After with the Slider

As soon as compression finishes, a comparison box appears. Move the slider back and forth to see for yourself that your photo looks clear, sharp, and clean.

  • Drag the line: Slide the blue handle left and right to inspect details between the original and new image.
  • See your space saved: Check your old size, new size, and total percentage saved (like -78%).
  • Easy to tweak: Need it smaller or higher quality? Just change the KB number and click COMPRESS again.
File Compressor — Split-Screen Comparison
DRAG SLIDER: Move the middle line to check image quality
Original (450 KB)
Compressed (98 KB)
Original 450 KB
Target 100 KB
Output 98 KB
Savings -78%
Step 05

Click Download Compressed File

When you are satisfied with the result, click the green Download Compressed File button. The smaller file will be saved directly into your computer's downloads folder.

  • Same file format: Your PNG stays PNG, JPG stays JPG, and WebP stays WebP. No unwanted surprises!
  • Direct file download: No messy ZIP files to unpack—your picture downloads immediately ready to use.
File Compressor — Download Compressed File
CLICK HERE: Click this green button to download your file
Download Compressed File
Speed Up Web & SEO

Boost Google Core Web Vitals and lower bounce rates by making your web pages load in under a second.

Pass Upload Limits

Easily satisfy strict 20 KB, 50 KB, or 100 KB upload limits on passport, visa, and job application websites.

Save Mobile Data

Send lightweight attachments over email, WhatsApp, and Slack without wasting storage or mobile bandwidth.

Frequently Asked Questions

How does this free file compressor work without uploading my data?

Unlike traditional online tools, our free file compressor runs 100% inside your local web browser using JavaScript and HTML5 Canvas. Your computer or phone does all the processing in memory. Zero bytes leave your device, making this file compressor free and completely private for sensitive photos and official documents.

Can I use this online image compressor for government visa and job portals?

Yes! Most official passport, visa, and government portals reject files that exceed 20 KB, 50 KB, or 100 KB. This online image compressor allows you to type your exact target size in KB. Our engine optimizes the file to land right under your required limit while keeping your facial details sharp.

Is this image compressor free with no limits or subscriptions?

Yes, this image compressor free tool has no subscriptions, no file size caps, no daily limits, and never adds watermarks to your pictures. You can use our free image compressor for personal photos, web design assets, and business documents as often as you like.

Does this tool work as a GIF compressor and support other formats?

Yes! Along with standard formats like JPG, PNG, and WebP, you can use our tool as an efficient gif compressor to reduce animated and static GIF file sizes. Transparent backgrounds and frame integrity are preserved cleanly.

Will this image compressor online make my images blurry or change their dimensions?

No. Your original width and height in pixels stay 100% untouched. If your photo is 4000×3000 pixels, the output file from our image compressor online is still 4000×3000 pixels. We remove redundant data weight without cutting down your resolution.

How do I remove or change my uploaded file?

Click the small × button on the file preview box, or simply drag a new picture right onto the upload area to replace it immediately.

Ready to Compress Your File?

Try it now! Upload your photo or document and compress it to the exact size you need in under 2 seconds.

Go to File Compressor