Virtuous and responsible file transfer
Crop a batch of images(JPEG, PNG, WebP, AVIF) to the same ratiolocally
100% local
Zero storage
No analytics
Free
How it works
Homogeneous crop and resize
Harmonize a folder of images (JPEG, PNG, WebP, AVIF) to the same aspect ratio and, if needed, the same pixel dimensions. Export files for first frame, last frame or multi-reference, and a thumbnail board.
Processing in your browser
- No upload to a server
- No remote storage
- Batch and folder supported
- Can be combined with compression
After the tool
Send the result: standard mode or Explore mode
When your file is ready on your device, send it with FileVert Transfer from the built-in send action. Choose whether the recipient downloads immediately (standard) or previews first in the browser without a silent local copy (Explore mode).
Standard mode
Secure link: the recipient downloads the file in the usual way. Best for final deliverables, archives and heavy attachments.
Guide: send very large filesExplore mode
Share images to flip through in a grid or fullscreen before any download decision.
Guide: photo gallery in the browserCrop, homogeneous resize and references for image to video
Same ratio and dimensions across the batch (16:9, 9:16, 1:1). Crop and resize locally. Export reference images or a thumbnail board. For first frame, multi-reference and image to video.
Aspect ratio crop and homogeneous resize
Every image at the same ratio (cover crop) and, optionally, the same pixel dimensions across the batch. Adjustable anchor.
Ratios 16:9, 9:16, 1:1, 4:3, 3:4, 21:9
Cover crop on the whole batch
Homogeneous resize in pixels (width or height)
Visually lossless compression (optional)
Thumbnail board generator
Group the batch into thumbnails on one board (automatic grid, 30 images max per page). Same format and quality as your export settings.
Auto grid, last row centered
Over 30 images: numbered pages in the ZIP
Board only or with exported batch
Use cases
Client approval
Thumbnail board to validate a series with the same framing.
Visual references
Batch crop to align mixed photos.
Web and transfer
Images with the same framing and dimensions, ready to publish or transfer.
Social media
Crop to the right ratio and resize to recommended resolutions for each platform.
- Instagram square — 1:1 · 1080×1080 px
- Instagram Story / Reels — 9:16 · 1080×1920 px
- TikTok — 9:16 · 1080×1920 px
- YouTube thumbnails — 16:9 · 1280×720 px
- YouTube Shorts — 9:16 · 1080×1920 px
- LinkedIn post — 1:1 or 4:5 · 1200×1200 px
- Facebook / X (feed) — 16:9 · 1200×675 px
Image to video
First frame, last frame or multiple reference images at the right ratio.
| Use case | Ratio |
|---|---|
| Vertical (stories, shorts, reels) | 9:16 |
| Horizontal (landscape, widescreen) | 16:9 |
| Square | 1:1 |
| Ultrawide cinema | 21:9 |
| Classic portrait / landscape | 3:4 / 4:3 |
Enlargement
Homogeneous dimensions across the batch before pixel enlargement. Some loss of sharpness may occur depending on the scale factor.
Need sharp ×2 or ×4? Image upscalerMainly need smaller file sizes?
Use the image compressor to compress and resize in pixels (width, height).
Image compressorPRIVACY
Privacy and digital sobriety
100% local processing
No data sent
EXIF metadata stripped
0 data stored
Everything stays on your machine.
Our other tools
Prepare your files with our other free, local tools.
Image Compressor
Reduce the weight of your images without visible quality loss.
UseAudio converter
Convert and compress audio files locally (MP3, M4A, WAV, FLAC, OGG), in batch, with no server.
UseCompress PDF
Compress and optimize your PDF documents instantly.
UseImage Upscaler
Upscale x2 or x4 without loss of sharpness for your visuals.
UseFrequently asked questions
Crop, references and image to video
Where are my images processed?
Where are my images processed?
In your browser, on your machine.
No files are sent to a FileVert server.
What does this tool do compared to the compressor?
What does this tool do compared to the compressor?
This tool focuses on cropping to the same aspect ratio (16:9, 9:16, 1:1), reference images and a thumbnail board generator.
Compression and pixel resizing are optional, at your choice.
Is compression required?
Is compression required?
No.
You can keep the original format or choose JPEG, PNG, WebP or AVIF with adjustable quality.
Without a format change, file size may stay close to the original.
Aspect ratio crop vs pixel resize?
Aspect ratio crop vs pixel resize?
Aspect ratio crop aligns framing (cover) across the batch.
Resizing width or height (Dimension column) is a separate option you enable only if you want fewer pixels.
What are reference images and the thumbnail board for?
What are reference images and the thumbnail board for?
The first frame sets the opening framing and lighting, the last frame defines the final shot, and multi-reference supplies several input images.
Harmonizing the whole batch to the same ratio avoids unwanted crops and stretching at generation time.
Which aspect ratio should I choose for image-to-video?
Which aspect ratio should I choose for image-to-video?
Pick the ratio of your final output before generating:
16:9 for landscape, 9:16 for vertical (stories, shorts), 1:1 for square.
Cropping after generation hurts quality.
If your source images are vertical, keep a vertical ratio to avoid stretching.
Should the first and last frame share the same aspect ratio?
Should the first and last frame share the same aspect ratio?
Yes.
For a clean transition between start and end images, both must share the same ratio and dimensions, otherwise the output may stretch or crop unexpectedly.
Batch cropping to one ratio ensures that consistency.
What resolution for a reference image?
What resolution for a reference image?
Aim for at least 1024 px on the shortest side.
A source that is too small leads to soft motion and artifacts:
the model cannot invent detail that was not in the input.
Are there limits?
Are there limits?
Yes:
up to 500 images per session, 2 GB total original size, 40 megapixels max per image and 100 MB max per file.
Can I process a folder with subfolders?
Can I process a folder with subfolders?
Yes.
Import a full folder:
the structure is preserved in the exported ZIP.
Are images modified during FileVert transfer?
Are images modified during FileVert transfer?
No.
FileVert does not recompress your files by default.
This tool prepares them before sending, if you choose to.
Do I need an account?
Do I need an account?
No.
Use it immediately, with no sign-up.
Homogeneous crop, resize and thumbnail board locally for image to video.