Rename files with custom
numbering and zero-padding.

Rename files with custom numbering and zero-padding

When filenames contain numbers, computers often sort them as text. That can place 1.jpg, 10.jpg, and 2.jpg in an unexpected order. A consistent sequence with leading zeros fixes the problem: 001.jpg, 002.jpg, and 010.jpg sort in the order you expect. BFOTKit is a free bulk rename tool for creating that sequence without typing commands or renaming files one at a time. No scripts, shell commands, or coding knowledge are needed.

A bulk rename utility for everyday files

Use this online bulk rename utility to bulk rename files in photo collections, video clips, audio tracks, scanned documents, PDFs, illustrations, spreadsheets, and other formats. The tool changes filenames while keeping each file’s original extension, so a PDF remains a PDF and a video keeps its format. You can add files from different folders to one list, which is useful when duplicate names or scattered folders make manual cleanup slow. The browser processes selected files locally and packages the renamed copies into a ZIP download; the original files on your device are left as they are.

Choose custom numbering and zero-padding

Set the filename prefix, starting number, and digit width to match the naming system you need. For example, a prefix of holiday_, a start number of 1, and three digits produces holiday_001.jpg, holiday_002.jpg, and holiday_003.jpg. Choose four digits for a larger set, such as scan_0001.pdf, or start at another number to continue an existing sequence. An optional suffix can identify a project or revision. Zero-padding adds leading zeros to shorter numbers so every filename uses the same width.

How to use a bulk rename utility

First, choose files or folders. Then select how the list should be ordered: alphabetically by filename, by folder and filename, in the order files were added, or with a custom order. Open the preview to move individual files up or down; the displayed destination names update with their sequence numbers. Next, enter the prefix, start number, and padding width. Check a few preview rows to confirm that the order and extensions look right. When the names are ready, choose “Rename & download ZIP.” Extract the archive to get the renamed copies. This straightforward workflow makes batch renaming accessible even if you have never used a command line or a desktop bulk rename program.

One sequence across multiple folders

If you select files from several folders, the numbers continue across the full selection instead of restarting in each folder. That helps organize a large image library, media project, or archive as one numbered set. Turn on the folder structure option if you want the ZIP to retain the original paths. Duplicate source filenames are also safe: each selected file receives its own numbered destination, so separate items do not overwrite one another inside the archive.

Preview first, then download renamed copies

A bulk rename tool should make the result clear before it changes anything. BFOTKit shows a live filename preview and lets you inspect and reorder the sequence before downloading. The rename happens in your browser, with no account, software installation, or server upload required. This is useful for renaming many files online while keeping their contents on your device. The tool supports batches of up to 30,000 selected files, subject to the memory and performance of your browser and device. If you need to rename an entire drive automatically without selecting files, a desktop file manager or dedicated batch rename program may better fit that workflow. For a selected batch, use this file renamer to create consistent, zero-padded names and download them together.