Why batch matters
Most real conversion jobs aren’t about one file. A photographer comes home from a shoot with 800 PNGs. A web developer needs every PNG and JPG in a project converted to WebP. A finance team has 50 monthly XLSX exports to push to CSV for the warehouse. A podcaster has a season’s worth of WAV stems waiting to become MP3. Doing those one at a time through a web tool with a 10-file daily cap and a 100 MB upload limit is how a 30-minute job becomes a week of toil.
File Converter Pro is built around a queue from the first click. Drop a folder, drop a multi-select, drop a thousand files at once — the app accepts everything, routes each file to the right pipeline, runs in parallel on multiple CPU cores, and writes the output exactly where you ask for it. Nothing uploads, nothing watermarks, nothing caps the count.
Step-by-step: a real batch run
- Install File Converter Pro. Open the Microsoft Store on Windows 10 or 11, search for File Converter Pro, and install. The free trial supports unlimited batch sizes from the start.
- Drop a whole folder into the app. Drag the source folder onto the main window. Mixed source formats are fine — the app routes each file by its format. Subfolders can be included or skipped via a toggle.
- Pick the target format. Choose the output format in the right panel. Settings (quality, codec, encoding, dimensions) apply to every file in the queue, so you get consistent results.
- Configure naming and folder mirroring. The default keeps original filenames and writes outputs next to the source. Switch to mirror mode to recreate the source folder tree in a separate output directory, or flatten everything into one folder. Filename templates accept tokens like
{name},{ext},{date},{counter}. - Click Convert. The queue runs locally on your CPU. Multiple files process in parallel. A progress bar shows total / per-file progress. You can pause, resume, or cancel without losing already-finished files.
Queue management for big jobs
For batches that take 10+ minutes, the queue itself becomes the workflow:
- Pause and resume: close your laptop, take it home, plug it in, hit resume. Already-finished files stay finished.
- Skip existing siblings: handy for incremental jobs — “convert everything that isn’t already converted”.
- Overwrite policy: always overwrite, never overwrite, or prompt per-file.
- Per-file errors: failed files are listed at the end of the run with a one-line cause. The successful files are unaffected.
- Notifications: Windows toast notification when a long batch finishes — useful for overnight runs.
Output naming patterns that actually scale
Filename templates matter when batches grow past a few hundred files. The naming language is simple but expressive:
{name}.{ext}— keep the source filename and pick the new extension. Default.{name}-converted.{ext}— distinguish output from source in the same folder.{name}-{date:yyyyMMdd}.{ext}— append the conversion date for archival.{counter:0000}-{name}.{ext}— zero-padded sequence, useful for video frame extracts or numbered handouts.{folder}/{name}.{ext}— mirror the relative path from the input root.
Common batch pitfalls and how the app handles them
- Naming collisions. Two source files with the same name in different folders. With folder mirroring on, no collision. With flatten on, the app appends a counter to keep both.
- Locked source files. Files open in another app can’t be read. The app skips them and lists them at the end so you can retry.
- Disk full mid-batch. The app pauses, shows a clear error, and resumes when space is freed.
- Mixed source formats with one target. Fine — the queue routes each file. Some pairs (e.g., MP4 → WAV) extract content rather than convert format.
- Slow target. Re-encoding video to AV1 is slow. The app uses multi-core encoding and shows a realistic ETA.
Where batch wins over web tools
Web file converters are built for one-file flows. Their batch features have file-count caps (typically 10-30 files), per-file size limits (usually 100 MB or 1 GB), session timeouts, and queue waiting periods on the free tier. For repeating professional workflows, the upload time alone often exceeds the actual conversion time.
A desktop app skips the upload entirely. The conversion runs at full local speed, on your CPU and your storage. Multi-gigabyte video masters and confidential PDFs never touch a third-party server. There’s no quota to plan around, and the same app handles every batch you’ll ever run.
Related guides
FAQ
How many files can File Converter Pro batch-convert at once?
Unlimited. The free trial and the €6.49 license both support batches of any size — drop a folder with thousands of files and the queue handles them all.
Can I mix different source formats in one batch?
Yes. The queue accepts heterogeneous folders. The app routes each file to the right pipeline based on its source format and the target format you pick — for example PNG → JPG and HEIC → JPG in the same batch.
Will the original folder structure be preserved on output?
Optional. Toggle “mirror folder structure” to keep the source layout, or flatten everything into one output folder. Output filename templates support tokens like {name}, {ext}, {date}, {counter}.
Is batch conversion offline?
Yes. Files never leave your computer. Useful when the batch contains confidential documents, NDA-protected designs, or multi-gigabyte video masters that web converters reject.
Try the batch workflow yourself
Install File Converter Pro from the Microsoft Store, drop a folder, and watch the queue chew through it locally — no upload, no watermark, no cap.