Rename many files at once: remove timestamps, renumber clips in order, add numbers
Processed in your browser. Nothing is uploaded. Updated on 25 Oct 2026.Drop up to 2,000 files, and every date and time stamp in their names is found and removed, clips are numbered in order across recording sessions, and each new name is shown before anything changes. Rename them in place in Chrome or Edge, or download a zip elsewhere. Nothing is uploaded or re-encoded.
Press Choose the folder to rename in Chrome or Edge, or press Choose files to drop them in.
Switch Remove timestamps, Number clips in order across batches or Add a number to every file on or off.
Use Find, Replace with, Prefix and Suffix, then check every new name in the After column.
Press Rename files on my disk for a folder, or Download renamed (zip); nothing is uploaded.
The Bulk File Renamer gives a folder of files clean names in one step. It was built for AI video clips - Google Flow names every download with the prompt, a clip number and a timestamp - and it works just as well on phone photos, WhatsApp media, screen recordings and anything else a device names for you.
Drop the files and each name is read for three things. A timestamp in any common shape: 20260927131308, 20260915_101233, 2026-09-15 at 10.12.33, a WhatsApp date, or a millisecond epoch. A clip number such as C01, clip 4, WA0003 or a trailing 07. And a stray extension left inside the name, like Manuscript.jpg_2026…jpg, which is dropped rather than doubled.
Files made together are kept together. A batch is every file saved within a few minutes of the one before - ten minutes by default, adjustable - because an AI tool saves one batch across several seconds, not in one instant. Batches follow each other in time, and inside a batch the clip number decides the order, not the second each file happened to be written. So a story made over two days, C01 to C05 on the first and C01 to C07 on the second, comes out numbered C01 to C12.
Every new name is shown next to the old one before anything happens, and no two files are ever given the same name. Add find and replace, a prefix or suffix, a change of case, or a number on every file.
Only names change. The files themselves are never opened for their content, re-encoded or uploaded, so a 4K or 8K video renames as quickly as a photo. In Chrome and Edge you can pick the folder and the files are renamed where they are; in other browsers the renamed files come back as one zip, stored without compression.
Drop the files on the page, or pick the folder in Chrome or Edge. Every new name is shown beside the old one: timestamps removed, clips numbered in order, and any prefix, suffix or find-and-replace you add. Press Rename and they change in place, or download them as a zip in other browsers.
Leave "Remove timestamps" on. It finds the stamp in every common form - 14 digits, date and time with separators, WhatsApp dates, epochs - removes it, and tidies the underscores or dashes around it. If two files end up with the same name, the second gets " (2)" so nothing is overwritten.
Each generation in Google Flow starts its clip numbers at C01. Drop all the batches together: they are told apart by the time gap between them, kept in the order they were made, and the clips are numbered straight through, so C01 to C05 and C01 to C07 become C01 to C12.
No. Only the name changes; the video is never opened, decoded or re-encoded, so a 4K or 8K file keeps every frame exactly as it was. That is also why a folder of large videos renames in seconds.
No. The names are worked out in your browser. In Chrome and Edge the files are renamed on your own disk through the folder you pick; elsewhere the zip is built on your device. Nothing is sent to a server.
Every new name is shown before anything changes, and the page keeps a list of old and new names you can download. To undo a folder rename, drop the renamed files back in and use find and replace, or keep the downloaded list to rename them back.
Still stuck? Ask about Bulk File Renamer and anybody who knows can answer. No account needed.
On the related tools: HAR Sanitizer – Remove cookies, Authorization headers and tokens from a HAR before sending it to support · Fake File Extension Checker – Spot a file whose extension lies, such as an .exe renamed to .pdf or a .zip named .jpg.