Batch File Renamer vs reNamerX

Batch File Renamer is a free, open-source web app for preparing new names for multiple files and previewing the results. It processes files locally in the browser, does not upload them and leaves source files unchanged. Ten operations cover find and replace, prefixes and suffixes, case changes, numbering, date and time, regular expressions, cleanup and extension changes. Presets handle numbering, date prefixes, filename cleanup, music files, episode formatting, lowercase conversion and replacing spaces. Users can save reusable operation chains in browser local storage and undo or redo changes across 50 operation states. Validation flags invalid or empty names, reserved Windows device names, trailing spaces or periods, names over 255 characters and duplicate selected outputs. Export creates a ZIP archive containing selected valid files as renamed copies rather than changing originals on disk. Modern browsers support file import; folder picking is best in Chromium-based browsers, and save-picker support varies. The MIT license permits use, modification and distribution subject to its notice. The web plan costs nothing and needs no installation or registration.

reNamerX is a free desktop application for batch file renaming on Linux, macOS, and Windows. It applies text operations, case transformations, and sequential numbering to groups of files, and can process hundreds using consistent rules. A live preview shows the proposed filenames before changes are applied. More advanced options include regular expressions, date and time insertion, metadata such as creation date and size, and reusable rule presets. Users can select individual files or all files in a directory. Batch changes can be undone with Ctrl+Z, and the app also supports redo. Its interface has dark and cyberpunk theme options. The project is distributed under the MIT License, and the repository provides Windows MSI and EXE installer options. Windows installation requires Windows 10 or newer, a 64-bit operating system, at least 50MB of free disk space, and 4GB of recommended RAM. Building from source requires Node.js 16 or newer, npm or yarn, Rust and Cargo, and Git.