Files Changed Since

About this tool

Two questions, one answer, which is why the tool asks which way round you want it.

"Did that actually work?" — a sync finished, a backup ran, an export completed, and you want to see what really landed rather than trust a progress bar that said Done. Show everything changed since this morning and you have your answer in one screen.

"What can I get rid of?" — the more useful question, and the one people forget can be asked. A project drive is rarely full of things you are still working on. Show everything untouched in the last year, sorted oldest first, and you have a shortlist for the archive.

Read-only. Nothing is uploaded, nothing is moved and nothing is deleted.

How to use it

• Click Choose a folder and pick it. Your browser will ask permission to read it
• Choose changed since or untouched since
• Pick a range — a day, a week, a month, three months, a year, or a date of your own
• Narrow it with Only these types if you only care about, say, the spreadsheets
• Copy the list, or download the CSV to sort and filter it properly

The list is sorted newest-first when you ask what changed, and oldest-first when you ask what has not — because in each case that is the end you actually want to read.

About the timestamp

This is worth being straight about, because it changes what the answer means.

A browser is given exactly one date for a file: last modified. Not the created date, not the last opened date, and not the date it arrived on your machine.

That is precisely the right thing for "what changed" — it is the timestamp that moves when a file's contents move.

For "what is old" it is a good proxy and not a legal record. Copying a file often resets it: move a folder to a new drive and everything inside may look like it was modified today. If a set of files all show the same suspiciously recent date, that is usually a copy, not activity. The CSV includes a full ISO timestamp alongside the readable one so you can check that yourself.

The ranges are whole days

"The last 7 days" means since the start of the day seven days ago, not the last 168 hours. A range that meant "since Tuesday afternoon" would quietly leave out things you did on Tuesday morning, which is not what anybody pictures when they pick a week.

Choose a chosen date for an exact cutoff — the day of a release, a handover, or the last backup.

What people use it for

• Verifying a backup or sync delivered what it said it did
• Finding what a build or export actually wrote
• Making an archive shortlist from files untouched in a year
• Working out what you did last week for a timesheet or a handover note
• Spotting a folder full of suspiciously recent dates — usually the sign of a copy, not of work
• Checking whether a shared folder is still in use before proposing to retire it

Good to know

• Works on Windows, macOS, Linux and ChromeOS — it is a web page, so there is nothing to install. It cannot work on iPhone, iPad or Android: mobile browsers have no way to hand a folder to a web page
• Every browser gives the same answer. Unlike the folder tools that need to see empty directories, this one only needs files and their dates, which the older file-list mechanism reports perfectly well
• Nothing is uploaded and nothing is changed. The tool has read-only access
• Folders themselves are not listed — only files have a modification date worth reporting
• The total at the top is the size of the matching files, which is the number you want when deciding what to move
• Very large folders are capped at 200,000 items so the page cannot freeze
• The list shows the first 500 files on screen; the CSV always contains every match

Related tools

• Folder Size Analyzer — see which of those old files are actually worth moving
• Compare Two Folders — check a copy arrived intact, file by file
• Duplicate File Finder — the other way to reclaim space
• Folder & File List — list everything, dates included