Free local-first file utility
Batch rename files online with live preview: add prefixes and suffixes, replace text, apply sequential numbers, then download a renamed ZIP. WebRenamer is a free web renamer that works 100% locally in your browser — no uploads, no installs, no signup. Whether you call it a file renamer, a batch rename tool, or a web renamer, the job is the same: turn messy filenames into clean, consistent names in seconds.
Drag & drop files here
Files stay local and folder paths are preserved
About the tool
A free online file renamer is a browser-based tool that renames many files in one pass. Instead of editing each filename by hand, you describe the change once — replace this text, add a sequence number, normalize the case — and the file renamer applies that rule to every file you dropped in.
WebRenamer is a local-first take on the online file renamer. The renaming runs entirely inside your browser: your files never leave your device, nothing is uploaded, and the renamed copies are packed into a ZIP on your machine. You get the zero-install convenience of a web tool with the privacy of a desktop app.
Use these examples to choose a rule. WebRenamer changes names in downloadable copies, not the file contents.
| Before | After | Rule |
|---|---|---|
IMG_2841.jpg | vacation-001.jpg | Sequential photo naming |
IMG_2842.jpg | vacation-002.jpg | Sorted numbering |
final report.pdf | final_report.pdf | Replace spaces |
client_draft_v2.pdf | client_review_v2.pdf | Find and replace |
Core Features
WebRenamer keeps every rename on your device while covering the practical rules people expect from a serious file renamer: numbering, replacement, case cleanup, pattern matching, and extension handling for everyday file organization.
See original names and new names side by side, catch duplicates early, and only export when the whole list is clean. Every rule you edit updates the preview instantly, so there are no surprises after the download.
Combine find and replace, prefix, suffix, numbering, case conversion, regex, trim, and extension rules in one workflow. Rules apply in order, and you can drag the steps to rearrange the sequence.
Start from presets for common tasks, then refine with custom operations instead of rebuilding the same workflow every time. Numbering, filename cleanup, and lowercase presets cover the most frequent jobs in one click.
Files stay in the browser during rename preview and ZIP generation, which keeps the tool fast and easy to trust. This online file renamer never uploads your documents, so confidential filenames stay confidential.
File type workflows
A filename problem is rarely limited to one format. A delivery folder usually holds PDFs next to JPEGs and spreadsheets, and each type fails in its own way: camera exports carry meaningless numbers, scanned documents carry scanner defaults, and downloaded files carry whatever name the sender's system produced. WebRenamer applies the same rule set across mixed folders, so you do not have to split one organization task into four.
Invoices, contracts, and statements carry confidentiality expectations, which is why a browser-based renamer that never sends the file to a server fits this job. Add a document-type prefix, a sortable date, and a sequence for multi-part files. Check the preview before exporting, since a wrong date inside a filename is easy to miss once the files are filed. See the full walkthrough for renaming PDF files.
Images and photos. Rename images such as IMG_4821.JPG and DSC_8841.CR2 into names a client can recognize, and add zero-padded sequences so galleries sort in the order you shot them rather than the order the camera wrote them.
Documents and spreadsheets. Standardize reports, exports, and records with predictable prefixes and date tokens, so a shared drive stays searchable for everyone on the team and not just the person who saved the files.
Extensions. Correct a wrong or duplicated suffix in one pass — the separate guide to the file extension changer covers what an extension change can and cannot do.
Best For
Comparison
Desktop tools such as Bulk Rename Utility or Advanced Renamer are powerful, but they usually require downloading and running software, and managed computers may restrict installation. Some tools also offer portable editions. A web renamer removes most of that setup: open the page, add your files, build a rule, done.
For one-off cleanups, shared computers, and locked-down work laptops, a browser-based file renamer is simply the faster option. And because WebRenamer processes everything locally, you do not trade privacy for convenience — confidential documents stay on your machine the whole time.
Compare the tradeoffs in our guide to compare free file renamer tools before choosing a workflow for a recurring job.
How To Use
Three steps from messy filenames to a clean, downloadable batch. No account, no upload queue — the file renamer starts working the moment your files land in the list.
Drag files or a folder into the drop zone, or browse from your device. Relative folder paths are preserved in the ZIP, and processing stays in the current browser session. Very large batches and files still depend on your device's memory and browser limits.
Apply presets or add rules manually for numbering, replace, case cleanup, prefixes, suffixes, regex, or extension handling. Each rule appears as a step you can edit, reorder, or remove, and every step shows exactly what it will change.
Check the before-and-after list, resolve duplicate or invalid filename warnings, then export the renamed package as a ZIP. Your original files stay untouched on the device — only the renamed copies are downloaded.
Use Cases
For a focused workflow across mixed file types, visit the bulk rename files guide.
Turn inconsistent camera filenames into clean numbered sets for client delivery, archives, or gallery uploads. A shoot renamed from DSC_8841.jpg to Anna-Ben-Wedding-041.jpg is easier to deliver, easier to sort, and easier to find later.
visually sort and number photosNormalize invoices, reports, statements, and exported records with predictable prefixes, dates, and formatting. Consistent document names make shared drives searchable for the whole team, not just the person who saved them.
Rename PDF filesFix spaces, mixed casing, duplicate words, and version noise before files move into production or handoff. Replace spaces with underscores, force lowercase, and strip draft markers in a single pass.
Batch vs. one file
Renaming one file is not a task worth optimizing. Renaming forty is. The breakover point is lower than most people assume: once a folder needs more than about ten files changed, doing it by hand costs more attention than setting up a rule, because the real expense is not the typing — it is remembering which files you already changed.
Three situations where bulk almost always wins:
Bulk renaming loses when the change is genuinely one-off — a single file you are about to send, where building a rule takes longer than typing a new name. If you are changing one file, just change it; the bulk rename workflow exists for the folder, not the file.
Naming rules
Most cleanup work is caused by decisions made months earlier. Four rules prevent most of it.
2026-04-12 sorts correctly in every file manager; 04-12-2026 does not, and 12-04-2026 is ambiguous across regions.1, 2, 10 sorts as 1, 10, 2. 001, 002, 010 sorts the way you mean it to and leaves room to insert a file later.final, final-2, and final-really add noise without information. Use a version number in a fixed position or a date that shows which one is newer.For platform-specific steps, read how to batch rename on Windows and Mac. For team-wide patterns, see our file naming conventions guide.
Pricing and limits
Yes. WebRenamer has no account requirement, no fixed file-count cap, and no download limit — the full rule set, including regex and extension handling, is available without paying.
The real constraint is your device, not the tool. Because renaming happens in the browser and nothing is uploaded, very large batches depend on your browser's memory. A few hundred files of normal size is comfortable; tens of thousands of large images in one pass is where a desktop utility with native file-system access may be a better fit.
FAQ
Short answers help you decide quickly — from privacy and pricing to platforms and supported rules.
Yes. The rename preview and ZIP export happen in your browser, and selected files are not sent to a server. The practical batch size depends on your device's memory and browser.
You can use find and replace, prefixes, suffixes, numbering, case changes, trim and cleanup rules, regex, date formatting, and extension changes. Rules stack in any order, and each step can be edited, reordered, or removed at any time.
Yes. The file list shows the original and renamed values live, which helps prevent duplicate names or formatting mistakes before export. Invalid characters and naming conflicts are flagged automatically as you build rules.
It works well for photographers, content teams, operations teams, agencies, and anyone managing large groups of files with inconsistent naming. If you rename files more than once a week, a rule-based file renamer saves real time.
There is no fixed file-count cap or download cap in the tool. Because processing happens in your browser, very large batches depend on your device's available memory and browser limits.
Yes. Because the file renamer runs in the browser, it works on macOS, Windows, Linux, and ChromeOS with nothing to install. On mobile, you can rename files from a phone or tablet in exactly the same way.
Nothing functional — both describe the same job. File renamer often implies batch work across many files, while file name changer often implies editing one name at a time. WebRenamer supports both in the browser. Open the file name changer.
Yes. WebRenamer is free to use without an account. The full rule set is available, and renaming runs locally in your browser so selected files are not uploaded.
No. Renaming changes the filename; the bytes inside the file do not change. A .docx renamed to .pdf is still a Word document with a misleading extension — an extension rule corrects a suffix but does not convert a file.
Drop a folder's worth of files into the free file renamer above, pick a preset or build your own rule, and download clean, consistent filenames as a ZIP. No signup, no upload queue, no software to install — just a fast online file renamer that respects your privacy.
Open the file renamerGuides
Sort a visual sequence before applying 001, 002, 003 numbering.
A practical workflow for organizing a large group of files.
Choose between browser-based and desktop workflows.
Create names that are easier to sort, share, and find again.
Organize document names locally and export a reviewed batch.
Correct a suffix without mistaking a filename change for file conversion.
Build a repeatable rule stack and check every proposed name.