Reduce the size of multiple video files without repeating every import and export. UniConverter 18 Compressor lets you choose a size or quality goal, review representative results, and save the batch together. Keep originals and prepare smaller delivery copies for uploads, campaigns, or review.
Desktop batch workflow for Windows
Desktop batch workflow for Mac
Both desktop apps and browser tools can process multiple videos. Compare how they handle your collection, settings, and result checks rather than assuming an online compressor handles only one file.
Use one queue for related clips, but keep the source and destination requirements in view. A short product close-up and a long demonstration may need different size or quality targets.
Open Compressor from Home or the left navigation menu. Add the local files belonging to the same delivery, then group clips with similar requirements before choosing the target.
Size Ratio applies a relative reduction; Max. File Size targets an MB ceiling; Quality Level sets a quality preference with a content-dependent output size. These are different goals, not interchangeable promises.
UniConverter 18 offers Fast Mode for one-pass processing and Precise Mode for two-pass size control. Available output and advanced settings depend on the source and selected configuration.
Use Preview before Apply, especially for clips with text, fine texture, reflections, or motion. Once the target works for representative files, confirm the output folder and run Compress All.
UniConverter 18 separates the size or quality goal from encoding mode and output settings. The current Windows Guide supplies the terminology below; controls can differ across versions and operating systems.
Start with the destination requirement. Lower size targets can increase visible quality loss, so preview the most demanding clips.
| Compression Control | What You Can Do | Important Conditions |
|---|---|---|
| Compression Goal | Size Ratio, Max. File Size, or Quality Level. | A percentage, an MB ceiling, and a quality preference solve different requirements. |
| Compression Mode | Fast Mode uses one pass; Precise Mode uses two passes. | Preview quality and confirm exported size; avoid promising the same reduction for every clip. |
| Output & Advanced Settings | Select an available Format and review encoder, resolution, frame rate, and audio controls. | Only change what the destination requires; format and codec availability depend on the configuration. |
| Batch, Preview & Export | Use common batch controls, review exceptions, Preview, Apply, Save to, and Compress All. | The Finished tab shows completed results. Check size, playback, audio, and output count. |
Technical references: V18 Compressor Guide, Batch workflow reference, Tech Specs.
Compression controls and format availability may vary by operating system and UniConverter version. See the UniConverter Tech Specs for current support and system requirements.
The current UniConverter 18 Windows workflow combines import, target selection, preview, and a reviewed batch export. Check the controls available in your installed version.
Open UniConverter 18 and choose Compressor from Home or the left navigation. Click Add Files or use the import menu to choose Add Folder. Add the local videos you want to process; keep original masters separate from delivery copies.
Open Compression Settings. Choose Size Ratio, Max. File Size, or Quality Level, then select an available Compression Mode and output Format. Review Advanced Settings only where needed. Use the bottom batch controls for a common target, Preview a representative clip, and select Apply. Review files that need individual changes.
Set the output folder with Save to and click Compress All. Monitor Compressing, then open Finished. Check actual file sizes, duration, visual detail, audio, and the expected number of videos. Use the folder icon to open the saved results and test a sample in the destination uploader.
Prepare multiple product videos for upload with batch conversion and compression. The same workflow also works for product launches, seasonal promotions, and routine catalog updates.
Separate storefront demos, paid-social variants, and internal review copies. Record the current format, codec, aspect ratio, duration, and file-size requirements for each destination.
If the destination rejects the actual container or codec, use Converter to create a supported file. A filename extension change does not convert media. Skip conversion when the file already meets the requirement.
If the format is accepted but the file is too large, use Compressor. Choose a size or quality target for that group and inspect labels, fabric texture, packaging, and fast product demonstrations.
Save channel-specific copies with recognizable SKU and version names. Check playback, audio, duration, dimensions, size, and count, then try a representative upload before releasing the full collection.
For example, a store may receive an accepted MOV product demo, a high-bitrate master, and a square ad export from different contributors. Inspect the files before choosing the operation. Shopify accepts MP4, MOV, and WebM product-video uploads, so a MOV extension alone is not a reason to convert. Check the current Shopify media requirements and the actual uploader.
| File condition | Recommended route | Result check |
|---|---|---|
| Accepted format, acceptable size | Keep the approved delivery file. | Avoid an unnecessary extra encode. |
| Accepted format, oversized file | Use Compressor with a suitable size or quality goal. | Verify actual size and readable product detail. |
| Unsupported container or codec | Use Converter and a supported output profile. | Check playback and uploader acceptance; conversion alone may not shrink the file. |
| Wrong framing or duration | Prepare a separate edited variant, then convert or compress if required. | Compression alone does not create a new crop or shorten the video. |
When an editor delivers new clips throughout the campaign, Watch Folder can repeat a known conversion setup as files arrive. The official workflow is in Converter; it is not a trigger for the separate Compressor queue.
Practical handoff: keep an incoming-master folder, a converted-copy folder, and channel-delivery folders separate. Stage completed editor exports into the watched folder. Inspect the converted copies; if they still exceed an upload limit, add those copies to Compressor for a separate reviewed batch. Prefer a single suitable export when it already meets compatibility and size requirements, avoiding repeated lossy encodes.
For a recurring job, test one representative file before relying on the rule. Watch Folder does not automatically publish to a storefront, create every ad aspect ratio, or guarantee a final file-size ceiling. See the official Watch Folder instructions and the batch video conversion workflow.
A paid desktop app is one option. These native workflows answer common searches for a free batch video compressor; compare their controls with your delivery requirements.
HandBrake: Free Desktop Queue
VideoKit: Local Browser Batch
AudioTools Hub: Browser Controls
Official guides for the compression, conversion, and alternative workflows described here.
Choose a size or quality target, preview the files that matter most, and compress the reviewed queue. Keep campaign-ready local copies organized by destination and preserve original masters.
