Free MB to KB Image Compressor to Resize Images Online
Drop images here or click to upload
Supports: PNG, JPEG, WebP
The image size is too large, so it won’t upload properly, and your website becomes slow. If your image size is more than 100 KB and you’re facing the same issue, then the MB to KB Image Compressor tool is the perfect solution for you. With this tool, you can reduce your image size as much as you want and customize it easily. It’s a completely free online image resizer that also takes care of your privacy.
Resize, Compress, Convert & Optimize Images Online
Welcome to mbtokb, a free online image compressor that helps you reduce the size of multiple images at once without affecting quality.
Our MB to KB Image Compressor makes image optimization fast, simple, and secure. You can compress multiple images at once, reduce image size in kilobytes, control quality, and download optimized files instantly. It supports JPG, PNG, and WEBP formats, works on all devices, and protects your privacy by not storing images after processing. Best of all, it’s completely free and beginner-friendly.
How to Change Your Images Sizes ?
Step 1: Upload Your Images
Drag and drop your images into the upload area or click Choose Images to upload files from your device. You can upload single or multiple images at once in JPG, PNG, or WEBP format.
Step 2: Set Your Target Size
After uploading your images, enter your required size in the Target Size box.
Then select KB or MB from the dropdown menu to choose your preferred unit.
This step allows you to control the final size of your compressed image.
Step 3: Compress Images
Click the green Compress Images button to start the process.
The tool will automatically compress your images and display:
- Original file size
- Compressed file size
- Percentage of space saved
If you want to upload new images, use the Clear All button to reset the tool.
Step 4: Download Your Image
Step 4: Download Your Images
Once the compression is complete, a Download button will appear next to each image.
- Click the button to download images individually to your device.
- You can also use the Download All option to save all compressed images at once in a single ZIP file.
This gives you the flexibility to download files one by one or all together, depending on your need.
Reducing image size helps improve your website’s speed
If you want to speed up your website, then follow the instructions given in the table below and our picture resizer tool will help you.
| Image Type | Recommended Dimensions (px) | Recommended File Size |
|---|---|---|
| Favicon | 32 × 32 | 1–5 KB |
| Menu Images | 360 × 360 | 30–100 KB |
| Portfolio Images | 600 × 400 | 50–150 KB |
| Header Images | 1280 × 400 | 70–150 KB |
| Blog Images | 1200 × 1200 | 150–350 KB |
| Collection Images | 1024 × 1024 | 100–300 KB |
| Product Images | 2048 × 2048 | 200–500 KB |
| Banner Images | 1600 × 500 | 100–250 KB |
| Hero Slides | 1920 × 1080 | 150–300 KB |
| Full-width & Background Images | 2500 × 1400 | 200–500 KB |
| Infographics | 1000 × 3000 | 300–500 KB |
| Store Logo | 450 × 250 | 30–100 KB |
Why mbtokb.site
A smarter MB to KB image compressor and converter
Every feature is built around one goal compress and convert images from MB to KB in seconds, without losing quality.
Key Features
Precise MB to KB compression
Set your exact target 10KB, 50KB, 200KB, or anywhere in between and the MB to KB image compressor hits it accurately every time.
10 KB – 350 KBBefore & after slider single and bulk
Drag the slider to compare original and compressed side by side. Works on both single images and every image in a bulk session.
Drag to compareBulk compression all on one page
Upload and compress multiple images at once. The bulk compressor is built right into the homepage no separate website needed.
Compress many at onceJPG, PNG, and WebP supported
Works with all major formats JPG, JPEG, PNG, and WebP. Upload any format, get the same format back, compressed and ready.
JPG · PNG · WebPInstant results in your browser
Compression runs entirely on your device. No server queue, no upload wait results appear in under a second, even on slow connections.
Zero upload delayDedicated pages for every country
From 10KB for PPSC applicants in Pakistan to 250KB for real estate in Australia every size page is built for real users in real countries.
10 KB to 350 KB pagesBenefits
Pages load faster, uploads never fail
Cutting a 3MB photo to 100KB makes it 30x lighter. Websites load faster, government forms stop rejecting your file, email attachments go through first time.
Up to 30× smallerNo visible quality loss
The compressor removes invisible data not the detail your eye can see. Verify it yourself with the before/after slider right after compressing.
Sharp & clear outputYour images never leave your device
Everything processes locally. No file is ever sent to any server. Your photos stay on your device unseen, unstored, completely private.
Zero server uploadWorks on any device, any browser
No app to install. Runs on Chrome, Safari, Firefox, and Edge on phones, tablets, and desktops Android, iOS, Windows, and Mac.
All devices & browsersAvailable in English and Deutsch
Full tool and all content in English and German one of the few MB to KB compressors built for European users as well as global ones.
English · Deutsch100% free no account, no limits
No registration, no hidden paywall, no watermarks. Compress one image or one hundred free to use as many times as you need, forever.
Always freeWho needs which size?
Real people, real portals, real size limits from Lahore to London and beyond.
PPSC & FPSC applicants
Pakistan’s government job portals PPSC, FPSC, NTS, and FBISE require your photo under 10KB. No exceptions, no workarounds.
Compress to 10KB →SSC & railway forms
SSC CGL, IBPS, and Indian Railways recruitment portals cap photo and signature uploads at 20KB. Crores of applicants need this every season.
Compress to 20KB →PSC & admission forms
Bangladesh Public Service Commission and university admission portals require applicant photos within 30KB. A strict limit many get rejected on.
Compress to 30KB →Visa & embassy portals
Several embassy and consulate visa systems including Schengen pre-application forms set their photo upload cap at 40KB.
Compress to 40KB →Passport & OCI photos
Passport renewal portals, OCI card applications, and immigration forms across the US, UK, Canada, and Australia accept photos under 50KB.
Compress to 50KB →College admission portals
University admission systems DU, Punjab University, Karachi University often cap documents and photos at 60KB per file.
Compress to 60KB →Online job applications
Many corporate HR portals and ATS systems set photo upload limits between 50–75KB. 70KB is the safe spot for most international job applications.
Compress to 70KB →Email newsletters
Mailchimp, Brevo, and email marketing platforms recommend keeping images under 80KB so newsletters load fast in every inbox, on every device.
Compress to 80KB →Medical & insurance forms
Health insurance portals and hospital patient registration systems especially in the US and UK require ID photos and documents under 100KB.
Compress to 90KB →LinkedIn & job portals
LinkedIn, Indeed, Naukri, and Rozee.pk profile photos look professional at 100KB. Most government job portals globally also accept this size.
Compress to 100KB →Etsy & small business
Etsy sellers, Squarespace portfolios, and Zillow listings load faster with 150KB images. Sharp enough to sell, light enough to never slow a buyer down.
Compress to 150KB →Shopify product photos
Jewellery, fashion, and lifestyle stores on Shopify and WooCommerce need rich product images that still load fast. 200KB keeps quality without killing speed.
Compress to 200KB →Real estate listings
Domain.com.au and realestate.com.au property photos perform best under 250KB. Real estate agents upload dozens of shots per listing every KB counts.
Compress to 250KB →WordPress & editorial blogs
European news sites, travel blogs, and content platforms use 300KB featured images. High quality for readers, fast enough for Core Web Vitals.
Compress to 300KB →Design portfolios
Photographers, architects, and designers uploading to Behance, Dribbble, or client portals use 350KB to keep full visual detail completely intact.
Compress to 350KB →Latest from Our Blog
Explore image compressor guides, photo resizer tutorials, kilobyte reducer tips, and online image converter tools.
- How Image Compression Works (Beginner Guide + Free Online Tools)
- JPG vs PNG vs WebP — Which Image Format Should You Use?
- How to Compress Images for Government Forms (Free & Easy Guide)
- Reduce Passport Photo Size — Free Online Guide (Step-by-Step)
- Compress Images for Job Application — Free Step-by-Step Guide
Frequently Asked Questions
Yes, MBTOKB uses smart compression techniques to reduce image size while maintaining visual quality. You can also adjust the compression level to get the best balance between quality and file size.
Yes, your images are completely safe. MBTOKB processes images securely and does not share your files with anyone.
MBTOKB supports popular image formats including JPG, JPEG, PNG, and WEBP.
Yes, MBTOKB allows you to resize or compress multiple images at the same time. You can upload several images together, compress them in one go, and download them individually or all at once as a ZIP file
No, MBTOKB does not store your images. All uploaded files are automatically deleted after compression to protect your privacy.
That is the goal. The compressor removes hidden technical data metadata, color profiles, and redundant pixels without touching the visible detail. At sizes like 50KB to 200KB, most people cannot spot any difference. Use the before/after slider to check for yourself in most cases the two images look identical.
Yes, the tool works fully on mobile. Open mbtokb.site in your phone browser Chrome, Safari, or any other upload your photo, set the KB target your form requires, and download. No app needed. It works the same on Android and iPhone as it does on a computer.
There is no strict file size limit. Since all compression happens inside your browser using your device’s own processing power, the only real limit is your device’s memory. Most images even large DSLR photos of 10MB to 20MB compress without any issues on modern phones and computers.
Yes. After every compression, a before and after slider appears right on the page. Drag it left or right to compare the original and compressed image side by side. This works for both single image and bulk compression so you always know exactly what you are downloading before you save it.
No. The MB to KB image compressor never adds any watermark, logo, or branding to your compressed images. What you download is a clean, compressed version of your original nothing added, nothing removed except unnecessary file data.