Features / Batch File Converter
Convert, rename and zip files in bulk
Process whole folders at once — convert images and videos, transform data formats, rename hundreds of files by pattern, and bundle everything into a ZIP. All offline, all on your own machine.
100% offline · No upload · Free for 8 files/day
The problem with cloud tools
Online and cloud-based alternatives come with real trade-offs.
Upload every file, every time
Services like CloudConvert require uploading each file to the cloud. For a folder of hundreds of files that is slow, exposes your data, and burns through bandwidth.
Conversion minutes and credits
Cloud batch converters meter you with monthly conversion minutes or per-file credits. Heavy batches push you into paid tiers fast.
No real bulk renaming
Online converters convert but rarely rename, sequence or archive. You still end up doing the tedious organizing by hand afterward.
One offline app for converting, renaming and archiving in bulk
- Batch-convert images, videos, audio and PDFs across formats
- Convert data files: CSV, Excel, JSON and XML in both directions
- Rename hundreds of files by pattern, prefix, suffix or sequence
- Find-and-replace text in filenames and change extensions in bulk
- Zip files and folders into archives — and extract them back out
- Preview every rename before it happens, then run it offline
What you can do
Built for batch file converter that stays on your machine.
Bulk convert
Convert a whole folder of images, videos, audio or PDFs in a single pass with shared settings.
Data formats
Transform CSV, Excel, JSON and XML between each other for spreadsheets and developer workflows.
Batch rename
Rename by pattern, add prefixes or suffixes, number sequentially, and find-and-replace in names.
Zip & extract
Bundle files and folders into ZIP archives, or extract ZIP, TAR and GZ — no online unzipper needed.
Preview first
See exactly how every file will be renamed before committing, so a big batch never goes wrong.
Always offline
No uploads, no conversion credits — your files are processed locally and never leave your device.
Tools included
Every one of these runs 100% offline inside 1FileTool.
Create ZIP
Compress files into a ZIP archive
Extract Archive
Extract ZIP, TAR, GZ archives
ZIP
ZIP one or more files or folders
Rename
Rename with prefix / suffix
Rename by Pattern
Use {name}, {index}, {date} patterns
Add Prefix
Add text before every filename
Add Suffix
Add text after every filename
Number Sequentially
Rename files as 001, 002, 003...
Find & Replace
Find and replace in filenames
Change Extension
Change file extensions in bulk
Preview Rename
Preview before renaming
CSV to Excel
Convert CSV to XLSX format
Frequently asked questions
What can I batch-convert with 1FileTool?
You can batch-convert images, videos, audio and PDFs across formats, and transform data files between CSV, Excel, JSON and XML. Each batch runs entirely on your own machine.
How is this different from CloudConvert?
CloudConvert uploads every file to its servers and meters you with conversion minutes. 1FileTool does it all offline with no upload, no credits and no daily cap on Pro — plus it renames and zips files, which cloud converters usually do not.
Can I rename a large batch of files at once?
Yes. You can rename by pattern, add prefixes or suffixes, number files sequentially, find-and-replace text in names, and change extensions in bulk — with a preview before anything is applied.
Can it create and extract ZIP archives?
It can. Bundle files and folders into ZIP archives, batch-zip multiple folders, and extract ZIP, TAR and GZ archives — no online unzip service required.
Is it free and offline?
All 23 file tools run 100% offline and are free for up to 8 files per day. Pro is a one-time purchase from $29 for unlimited batches.
Explore more capabilities
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Batch-process your files offline
Get 23 offline file tools in 1FileTool. Free for 8 files a day, Pro from $29 one-time.
Get 1FileTool