Crop hero background

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 files

Explore mode

Share images to flip through in a grid or fullscreen before any download decision.

Guide: photo gallery in the browser

Crop, 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.

Recommended aspect ratios by use case for image to video
Use caseRatio
Vertical (stories, shorts, reels)9:16
Horizontal (landscape, widescreen)16:9
Square1:1
Ultrawide cinema21:9
Classic portrait / landscape3:4 / 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 upscaler

Mainly need smaller file sizes?

Use the image compressor to compress and resize in pixels (width, height).

Image compressor
PRIVACY

Privacy and digital sobriety

100% local processing

No data sent

EXIF metadata stripped

0 data stored

Everything stays on your machine.

Transfer your visuals

Once the batch is ready, send it with FileVert.

Start a transfer

Frequently asked questions

Crop, references and image to video

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?

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?

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 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?

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?

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?

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?

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?

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?

Yes. Import a full folder: the structure is preserved in the exported ZIP.

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?

No. Use it immediately, with no sign-up.

Homogeneous crop, resize and thumbnail board locally for image to video.