File Size Converter
Convert between different file size units quickly and easily
Input
Conversion Results
Real-World Comparisons
File Size Converter – Quickly Change Between KB, MB, GB, and More (2025)
What Does a File Size Converter Do?
A File Size Converter is a free, quick, and accurate online tool that lets you convert digital file sizes between bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB) in seconds.
Whether you’re:
- Checking email attachment limits (e.g., 25 MB max)
- Comparing cloud storage plans (100 GB vs. 45,000 MB)
- Estimating download times
- Managing photos, videos, or backups
—you get clear, precise conversions instantly—with no sign-up, no personal data, and complete privacy.
✅ Enter a number
✅ Pick “from” and “to” units
✅ Get an instant, human-readable result
How to Use the File Size Converter
Only three simple steps:
1. Type in the Value
Enter any number (e.g., 2048).
2. Choose Input and Output Units
- From: e.g.,
MB - To: e.g.,
GB
3. Get Results Right Away
✅ See the converted value (e.g., 2048 MB = 2 GB)
✅ Toggle between decimal (SI) and binary (IEC) formats:
- GB (1 GB = 1,000 MB) – used by storage manufacturers
- GiB (1 GiB = 1,024 MiB) – used by Windows/macOS
✅ One-click copy or reset
✅ Works on iPhone, Android, and desktop
✅ No email, no login, no cost
Why Use a File Size Converter in 2025?
Digital storage is everywhere—but units are confusing and inconsistent:
- ❌ Email services limit attachments to 25 MB
- ❌ Cloud plans advertise 100 GB, but your file is 45,000 MB
- ❌ Hard drives use base 10 (1 GB = 1,000 MB)
- ❌ Operating systems use base 2 (1 GiB = 1,024 MiB)
- ❌ Video editors wonder: “Will a 4.7 GB DVD hold my 5 GB file?”
Our converter brings clarity by:
- ✅ Supporting both decimal (SI) and binary (IEC) standards
- ✅ Providing real-world context:
- “1 GB ≈ 250 MP3 songs”
- “500 MB ≈ 1-hour standard video”
- ✅ Running 100% in your browser—no data collection
Great for students, developers, photographers, video editors, and everyday users.
Key Features
- 🔄 Two-Way Conversion: KB ↔ MB, GB ↔ TB, bytes ↔ MB, and more
- 📏 Dual Standards Support:
- Decimal (SI): 1 KB = 1,000 bytes
- Binary (IEC): 1 KiB = 1,024 bytes
- 📱 Fully Responsive: Works on all devices
- 🔒 Browser-Only Processing: No server uploads or tracking
- ⚡ Instant Results: Under 1 second
- 🧼 Clean Light UI: Simple, ad-free interface
- 💡 Real-World Examples: “1 GB ≈ 250 songs” or “500 MB ≈ 1-hour video”
Frequently Asked Questions (FAQs)
Q: Is this a free file size converter?
Yes! No trials, sign-ups, or hidden costs—completely free.
Q: What’s the difference between MiB and MB?
- MB (megabyte) = 1,000,000 bytes (used by storage brands)
- MiB (mebibyte) = 1,048,576 bytes (used by Windows/macOS)
Our tool lets you choose either system.
Q: Can I convert bytes to terabytes?
Yes! Handles values from 1 byte to 100+ TB with full accuracy.
Q: Will it work on a phone?
Yes! Fully optimized for iPhone and Android.
Q: Is my information safe?
Yes. All conversions happen in your browser. We never save or transmit your inputs.
Q: Can I use it for photo or video planning?
Absolutely! Estimate how many photos, songs, or 4K videos fit in your storage.
Q: Who should use this tool?
Perfect for content creators, IT professionals, students, teachers, and anyone managing digital files.
Q: Can I convert multiple files at once?
Not yet—but a CSV batch converter is coming in 2025.
Related Tools
- Unit Converter – Convert length, weight, speed, and more
- Image Resizer & Compressor – Reduce image file sizes after conversion
- Homepage
Trusted by Tech Professionals Worldwide
For official standards on digital units and binary prefixes, we follow the International Electrotechnical Commission (IEC) – IEC 60027-2 —the global standard that defines KiB, MiB, GiB, and prevents confusion in computing and storage.
✅ Convert your file sizes now—quickly, for free, and eternally private.
Use the free File Size Converter from Toolsspark.