Timestamp Script Generator
Set an exact date or shift by an offset for a batch of files, then generate a ready-to-run touch or PowerShell script that applies it on your machine.
Since the browser doesn't know each file's current timestamp, the shift script uses relative date math at run time (e.g. date -d "+1 day").
How to use Timestamp Script Generator
- Use these example values as a starting point: /photos/img001.jpg /photos/img002.jpg.
- Set the inputs and options shown here: File paths (one per line), New date/time, Shift amount (days), Direction, Target shell.
- Follow the format note: Since the browser doesn't know each file's current timestamp, the shift script uses relative date math at run time (e.g. date -d "+1 day").
- Run the tool with Generate Script.
- Review the results, then choose an output control: Download Script, Copy.
Why a browser can't touch your file's real timestamp — and what helps instead
No web page can reach into your operating system and change a real file's last-modified date directly; that's a filesystem-level operation no browser API exposes, and any tool claiming otherwise should raise suspicion. What this generates instead is the exact touch or PowerShell command to set or shift timestamps yourself, reviewed before you run it.
Setting an exact date versus shifting by an offset
Setting an exact date is straightforward when you know the target timestamp; shifting by an offset (forward or backward by N days) is for cases where you want to preserve each file's relative timing while moving the whole set, and the generated script reads each file's current timestamp at run time to calculate the new one.
Why would I need to change a file's timestamp?
Common legitimate reasons include correcting a timestamp after a migration that reset dates, or restoring original dates after a backup/restore process that didn't preserve them.
Does the shift mode need to know the current timestamp?
No — the generated script reads each file's actual current timestamp at the moment it runs and calculates the new one from there, so you don't need to know it in advance.
Will this work on a read-only or synced file?
That depends on your operating system's permissions and whether a sync tool (like Dropbox or OneDrive) might overwrite the change afterward — review your specific setup before running the script.