AutoCrop Pro is a free Windows app that removes letterboxes, pillarboxes, and black bars from hundreds of images and videos in one run. Drag a folder, preview the crop, and process in parallel on your CPU — files never leave your hard drive.
No account · No subscription · FFmpeg required for video only
AutoCrop Pro is a free, open-source Windows desktop app that automatically detects and removes black borders, letterboxes, and pillarboxes from images and videos in batch. It runs 100% offline on your PC using a Rust parallel backend (Rayon) for images and FFmpeg cropdetect on 30 sample frames for video — with a live preview overlay and a single tolerance slider.
Every editor, archivist, and content team hits the same wall. The crop takes seconds — the workflow around it eats your week.
"I just need to strip letterboxes — not open a full timeline for each clip."
Import, crop, export, repeat. For a folder of screen recordings or VHS rips, that's an afternoon gone. AutoCrop Pro processes the whole folder while you grab coffee.
"My client's NDA footage is not going on some random website."
Online croppers want gigabytes uploaded over Wi-Fi. Slow, lossy, and a security nightmare for sensitive media. AutoCrop Pro never touches the internet.
"I know cropdetect works — I just don't trust myself with 400 files."
One wrong flag in a batch script and you've re-encoded an archive with artifacts. AutoCrop Pro gives you FFmpeg's power with a visual preview before you commit.
"I cropped it twice and now it looks like a potato."
Every re-encode through a web tool adds compression damage. AutoCrop Pro offers lossless PNG output or copies the original wrapper. Crop once, crop right.
Rust parallel processing on the backend. A visual dashboard on the front. No compromises.
Rayon distributes work across every CPU core. Drop 500 files, click process, and watch them fly through the queue.
Images get pixel histogram sweeps with a 1% noise floor. Videos run FFmpeg cropdetect across 30 sample frames for accurate widescreen boundaries.
Click any queued file to see the detected crop region. Drag the tolerance slider and watch boundaries update in real time.
Toggle a 10px buffer so the detector never clips subtitles, captions, or edge content you want to keep.
Export lossless PNG for design assets, compressed JPEG or WebP for web, or keep the original file wrapper untouched.
After processing, browse cropped files in a lightbox gallery. Open the output folder with one click.
Drag a folder of JPG, PNG, WEBP, MP4, MOV, MKV, or any supported format onto the app. Hundreds at once.
Click any file to see the crop overlay. Adjust tolerance until borders snap perfectly — without touching pixel math.
Hit process. Cropped files land in Documents/AutoCrop_Output/. Originals stay untouched.
Standardize mixed-aspect footage, screen recordings, and old TV rips without opening a timeline for each clip.
Batch-strip scanner borders and black margins from product shots, mockups, and web assets.
Digitizing VHS, DVD, or scanned collections? Remove thick analog borders from hundreds of files overnight.
Sensitive footage stays on-premise. No third-party uploads, no compliance headaches.
Drag the slider to see how AutoCrop Pro sweeps pixel histograms inward from each edge. Below 13% misses borders. Above 45% clips into your content.
Below 13% misses borders. Above 45% clips into your content.
Hit simulate to see how the backend queues files, spawns FFmpeg for video, and reports progress in real time.
No subscriptions, no license keys, no black-box uploads. AutoCrop Pro is MIT-licensed — read the Rust backend on GitHub, fork it, contribute fixes, and ship your own builds.
Choosing how to strip letterboxes from a large media folder comes down to speed, privacy, and control.
| Method | Batch speed | Privacy | Live preview | Cost |
|---|---|---|---|---|
| AutoCrop Pro | 500+ files, parallel Rust | 100% offline | Yes — tolerance slider | Free (MIT) |
| Premiere / Photoshop | ~3 min per file | Local | Yes | Subscription |
| Online crop tools | Upload-limited | Cloud upload required | Varies | Freemium |
| FFmpeg cropdetect scripts | Fast if scripted | Local | No — CLI only | Free |
AutoCrop Pro is a free, open-source Windows desktop app that automatically detects and removes black borders, letterboxes, and pillarboxes from images and videos in batch. It runs 100% offline using a Rust parallel backend and FFmpeg cropdetect for video.
No. It's a native Tauri app that runs entirely on your PC. No files, telemetry, or tracking leaves your machine.
For images, the Rust backend builds per-row and per-column brightness histograms and sweeps inward from each edge. For videos, it runs FFmpeg cropdetect on 30 sample frames and parses the optimal crop region.
Only for video. Install FFmpeg and add it to your Windows PATH. Image cropping works immediately with no extra dependencies.
%USERPROFILE%\Documents\AutoCrop_Output\ — named {original}_cropped.{ext}. Source files are never modified unless you enable Delete Originals.
Images: JPG, PNG, WEBP, BMP, GIF, TIFF. Videos: MP4, MOV, MKV, AVI, WEBM, FLV. Video processing requires FFmpeg installed and on your Windows PATH.
AutoCrop Pro wraps FFmpeg cropdetect and Rust edge detection in a visual interface with live preview, batch queue, and parallel processing. You avoid writing one-off shell scripts and see exactly what will be cropped before processing hundreds of files.
The Rust core is cross-platform. Current installers target Windows 10/11 (MSI + NSIS). macOS and Linux packages are planned.
Download AutoCrop Pro. Drop your files. Get back to actual creative work.
No account. No subscription. MIT license. · Windows 10/11 · WebView2 required
