Batch File Renamer
Rename multiple files in bulk using powerful rename patterns. Add prefix/suffix, find and replace text, auto-number with configurable padding, and change letter case - all with a live preview before downloading.
Drop files here or click to upload
Any file type supported - all processing stays in your browser
Files
0
Selected
Conflicts
0
None
Invalid
0
Bad characters
Ready
0
To download
Upload files to start batch renaming. You can add multiple files at once.
No data is sent to any server - everything stays on your device.
How to Use
- Upload: Drop files or click to browse. Any file type works.
- Prefix/Suffix: Add text before or after each file name.
- Find & Replace: Replace specific text in file names (e.g. “draft” → “final”).
- Numbering: Auto-number files with configurable start and padding (001, 002…).
- Case: Convert to lowercase, UPPERCASE, or Title Case.
- Preview: See all changes in the table before downloading.
- Download: Click “Download All” to save renamed files individually.
Privacy Guarantee
All file processing happens entirely in your browser. Your files are never uploaded to any server. No data leaves your device - no API calls, no storage, no tracking.
Why Use the Batch File Renamer?
Rename hundreds of files in seconds with powerful pattern-based renaming - all in your browser, no software installation required.
Multiple Rename Patterns
Apply prefix/suffix, find & replace text, auto-numbering (001, 002…), and case conversion (lowercase, UPPERCASE, Title Case) - all at once or individually. Combine patterns for powerful batch renaming.
Live Preview
See exactly how each file will be renamed before downloading. The preview table shows original name, new name, file size, and highlights conflicts or invalid characters - no surprises.
Any File Type
Works with any file type - documents, images, videos, audio, code files, archives. Extensions are preserved automatically. Upload as many files as you need in one go.
100% Browser-Based
All processing happens locally in your browser. Files are never uploaded to any server. Your data stays on your device - no privacy concerns, no file size limits imposed by servers.
Who Should Use Batch File Renaming?
Perfect for photographers, developers, content creators, and anyone dealing with large numbers of files that need consistent naming.
Photo & Image Organization
Rename DSC_001.jpg → vacation_italy_001.jpg for your photo albums. Add dates, locations, or project names to keep your image library organized and searchable.
Code File Standardization
Standardize code file naming across your project. Remove inconsistent prefixes, apply lowercase convention, or add module prefixes to keep your codebase clean and consistent.
Document Batch Processing
Rename hundreds of invoices, contracts, or reports from generic names (scan001.pdf) to meaningful names (invoice_acme_2024_001.pdf) in one go.
Video Content Management
Organize video files exported from editing software. Apply consistent naming with sequential numbering and project prefixes for your video library.
Audio File Organization
Clean up podcast episodes, music files, or audio recordings. Add episode numbers, standardize formats, and remove extra text from batch exported files.
Team File Sharing
Before sharing files with clients or team members, batch rename them to remove internal naming conventions and apply professional, consistent file names.
About the Batch File Renamer
Rename files in bulk with powerful pattern-based rules - all in your browser, no uploads, no signup.
How Batch Rename Patterns Work
Our batch file renamer applies rename rules in a specific order to give you predictable results. First, Find & Replace runs - it substitutes any matching text in the original file name. Second, Case conversion is applied. Third, Numbering is inserted (either before or after the name). Finally, Prefix and Suffix are added to the beginning and end of the name (before the extension). This order ensures consistent, predictable results every time.
Conflict Prevention
When renaming multiple files, duplicate names can cause files to overwrite each other. Our batch file renamer automatically detects naming conflicts before you download - highlighting them in red and preventing download until resolved. Simply adjust your prefix, numbering, or find/replace rules to make all names unique. Invalid characters in file names (like /, \, :, *, ?, ", <, >, |) are also flagged.
File Extensions Are Preserved
File extensions (like .jpg, .pdf, .docx) are critical for your operating system to know how to open files. Our batch file renamer automatically detects and preserves the extension of every file. Your rename rules only affect the base name - so a file called report.pdf stays a PDF even after renaming.
Privacy & Security First
Unlike online file renamers that upload your files to a server, our Batch File Renamer processes everything locally in your browser using JavaScript. Your files are read directly from your device, renamed in memory, and offered for download - they never travel over the network. This means no file size limits, no upload time, and zero privacy concerns. Your sensitive documents stay on your device.
Related Tools
Meeting Time Zone Planner
Find overlapping working hours for participants in different time zones - visual 24-hour timeline, 60+ IANA time zones, DST-accurate, up to 8 participants - Free online meeting planner
Meeting Agenda Builder
Create structured meeting agendas with time slots, presenter assignments, and notes. Export as plain text or PDF - Free online meeting agenda builder.
Meeting Scheduler (Availability Matrix)
Plan your week by entering available time slots across multiple days. Set meeting duration and buffer preferences, then generate an optimised weekly timetable that maximises focused work time - all running locally in your browser, no signup required. Free online Meeting Scheduler.
Task Deadline Calculator
Calculate the actual deadline considering working days only. Enter a due date, exclude weekends and holidays (with country presets), and see the number of working days remaining. Also calculates backwards: if a task takes N working days, when should you start?
Frequently Asked Questions
Everything you need to know about batch renaming files in your browser.