Bulk File Replace is a free browser-based tool that lets developers and designers overwrite multiple files across a deep folder structure in seconds.
Instead of navigating into nested project folders one by one, you drop your updated files (or a zip), pick your destination folder once, and the tool finds every matching filename automatically and overwrites them all.
Drag in individual files or a .zip — zip contents are extracted automatically.
Select your project folder. The tool scans every subfolder for matching filenames.
Preview what will change, then copy. Backups are created automatically.
The web version runs entirely in your browser using the File System Access API — your files are never uploaded to any server. The desktop app goes further: fully offline, no browser needed, with a native folder picker and watch mode that auto-copies files whenever they change on disk.
The free web version works in Chrome and Edge with no install required. It handles drag-and-drop, zip extraction, folder scanning, and timestamped backups — all from your browser.
The desktop app ($9 one-time) adds watch mode that auto-copies files when they change, a native Windows folder picker, offline support, and no permission prompts. It's ideal for developers who replace files frequently and want a tool that stays open in the background.