File Size Check

File Size Check — Instantly See How Big Your Images Are

Check image file size in bytes, KB, and MB. Plan storage, verify upload limits, and compare formats.

Drag & Drop Images

or click to browse multiple files

Results
Your images never leave your device — 100% browser-based analysis

How to Check File Size

Three simple steps to see exactly how big your images are

1

Drop Your Images

Drag and drop one or many JPG, PNG, WebP, or GIF files into the upload area.

2

Read File Size

Instantly see the file size in bytes, KB, or MB alongside dimensions and format.

3

Compare & Plan

Upload multiple images to compare file sizes and decide what to compress or keep.

Common Upload & Email File Size Limits

Know whether your image will fit before you upload

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Email

Gmail 25 MB · Outlook 20 MB · Yahoo 25 MB per attachment

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Social Media

Instagram 8 MB · Twitter/X 5 MB · Facebook 10 MB per photo

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Web & CMS

WordPress 2 MB default · Shopify 20 MB · Squarespace 20 MB

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Government

Passport photo < 200 KB · Visa applications vary by country

Why Check File Size with MinifyPic?

🔒

100% Private

Files stay on your device. Nothing is uploaded to any server — ever.

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Batch Comparison

Drop a whole folder of images to compare file sizes side by side.

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Instant & Free

No sign-up, no watermark, no limits. Results appear the moment you drop a file.

Understanding Image File Size

Image file size is the amount of storage space a picture occupies on disk, measured in bytes, kilobytes (KB), or megabytes (MB). It depends on the image dimensions, color depth, format, and compression level.

A high-resolution 4000 × 3000 JPEG photo typically weighs 3–8 MB, while the same image saved as an uncompressed PNG can exceed 30 MB. Understanding file size helps you:

  • Meet upload limits — email services and social platforms impose strict caps.
  • Speed up websites — smaller images load faster and improve Core Web Vitals.
  • Plan storage — know how many photos fit on a USB drive or cloud quota.
  • Choose formats wisely — WebP and AVIF can cut size by 50% vs. JPEG with similar quality.

Frequently Asked Questions

File size (KB/MB) is the storage space the file uses on disk, while dimensions (pixels) describe the width and height of the image. A 1920×1080 image can be 200 KB as a compressed JPEG or 6 MB as an uncompressed PNG — same dimensions, very different file sizes.

Use our Image Compressor to reduce file size without losing visible quality. You can also convert to a more efficient format (e.g., WebP) or resize the image to smaller dimensions.

For photos, WebP and AVIF typically produce the smallest files at a given quality. For graphics with few colors, PNG-8 or SVG is ideal. JPEG remains the most universally compatible option for photographs.

Yes — Gmail allows up to 25 MB, Outlook up to 20 MB, and Yahoo Mail up to 25 MB per message (total attachments). If your image exceeds the limit, compress or resize it before attaching.

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