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File Size Analyzer

Analyze and visualize file sizes with detailed breakdown and percentage distribution

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Select Files to Analyze

Keep file preview metadata in this browser only When enabled, file names, sizes, MIME types, and analysis summaries are stored locally on this device only. This helps restore preview outputs across tabs using the same storage profile. Your files never upload.

A compact file-size chart with stacked usage bars

Choose files to compare sizes

Add a batch to see total size, relative percentages, and the largest files first so you can spot storage-heavy items quickly.

Sorts largest files to the top
Percentages update as you add or remove files

Understanding File Sizes

Tiny: Less than 1 KB - Small text files, icons

Small: 1 KB to 1 MB - Documents, small images

Medium: 1 MB to 10 MB - Photos, presentations

Large: 10 MB to 100 MB - HD videos, large datasets

Very Large: Over 100 MB - 4K videos, software packages

Jump to helper sections

What does the size analyzer show?

The analyzer shows each file's size, its percentage of the total, and a visual breakdown. This helps identify large files that consume most of the space in a batch.

How is the percentage calculated?

Each file's percentage is calculated as (file size / total size of all files) × 100. This shows the relative size contribution of each file.

Can I analyze folders?

This tool analyzes individual files only. To analyze a folder structure, you would need to manually select all files within the folder.

What's the maximum number of files I can analyze?

There's no hard limit, but analyzing thousands of files may slow down your browser. The tool works best with up to a few hundred files at once.

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.

Session file-tool analysis history

Keep a local, session-only record of successful file analyses in this browser session.

No analysis results yet. Run a file analysis to populate this panel.

Session download history

Re-download generated file outputs from this browser session.

No generated outputs yet. Use a file tool in this session to populate this panel.