FILE TOOL // 029

Backup Set Compare

Compare two selected backup folders by relative path, file size, and modification time. Added, missing, and changed candidates are separated in a downloadable report.

Processed locally in your browser

Choose a parent folder

Must contain two top-level sets

Drop files here Select a parent folder containing exactly two backup folders.

FileSizeType

No files selected.

Choose files to begin.0 files

How to use Backup Set Compare

Select Parent folder with two sets using the file area.
Review the selected filenames and sizes.
Choose any available options and click Compare Backup Sets.
Read the findings, then download the JSON comparison report.

What this file tool does

Builds two inventories from the first two top-level folder names supplied by the browser and compares matching relative paths.

Paths present in one set are classified as missing or added. Matching paths with different size or modification time are marked as changed candidates.

Your selected files stay in this browser session. Browser folder selection supplies size and timestamps but not a trusted content hash. Equal size and time do not prove equal bytes.

Supported inputs and limits

Browser folder selection supplies size and timestamps but not a trusted content hash. Equal size and time do not prove equal bytes.

Item	Support
Input	Parent folder with two sets
Output	JSON comparison report
Processing	Local browser session

Example and practical tips

Practical example

Place Backup-2026-07-01 and Backup-2026-07-27 inside one parent folder, then select that parent for a side-by-side inventory check.

Tips

Keep an untouched copy of important source files.
Check filenames and sizes before downloading the result.
Use a current desktop browser for the broadest file API support.

Frequently asked questions

How can I use backup set compare without uploading files?

Choose the requested files in this page and run the tool. Processing happens in your browser, and only the result you download leaves the page.

What does the downloadable json comparison report contain?

It contains the actual result or evidence produced from the selected file bytes and metadata, with the important findings shown on screen as well.

Can I use backup set compare on a large file?

Browser memory and device speed set the practical limit. Start with a smaller sample if the file is several gigabytes or the device has limited memory.

Does this tool change my original files?

No. Browser file access is read-only here. The tool creates a separate result for download and does not overwrite the selected originals.

Is a clean result a complete security guarantee?

No. The result covers the checks described on this page. Use specialized desktop or forensic software when you need deeper validation.

Related file tools

Double Extension Detector Incremental Backup File Selector File Metadata Privacy Scanner MIME Type Detector

Result details

Field	Meaning
Primary result	Main finding from the selected files
Download	JSON comparison report
Status	Complete only after a real result Blob is created

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