AutoCrop Pro removes letterboxes, pillarboxes, and black bars from images and videos. Crop a few files in your browser, or download the Windows app for huge offline batches — files never go to our servers.
AutoCrop Pro automatically detects and removes black borders, letterboxes, and pillarboxes from images and videos. Crop a handful of files in your browser (nothing is uploaded to our servers), or use the free Windows app for 500+ file batches with a Rust parallel backend and FFmpeg cropdetect.
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 to a cloud cropper."
Cloud croppers want gigabytes uploaded over Wi-Fi. Slow, lossy, and a security nightmare for sensitive media. AutoCrop Pro crops in your browser tab or on your PC — files never go to our servers.
"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.
Same flow in the browser cropper or the Windows app. The app is built for hundreds of files at once.
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 your machine. Crop in the tab or in the Windows app — no third-party cloud uploads.
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.
Crop your own files in the browser — no install, files stay in this tab.
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 (Windows) | 500+ files, parallel Rust | 100% offline on your PC | Yes — tolerance slider | Free (MIT) |
| AutoCrop Pro (Web) | A handful of files, in-tab | No upload — stays in the browser | Yes — real crop overlay | Free (MIT) |
| Premiere / Photoshop | ~3 min per file | Local | Yes | Subscription |
| Cloud 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 tool that automatically detects and removes black borders, letterboxes, and pillarboxes from images and videos. Use the in-browser cropper for a few files, or the Windows desktop app for huge offline batches.
The Windows app is a native Tauri program that runs entirely on your PC — no files, telemetry, or tracking leave your machine. The website cropper also never uploads your media to AutoCrop Pro; it runs in this tab. Video in the browser loads a local FFmpeg engine from a CDN once.
For images, AutoCrop Pro builds per-row and per-column brightness histograms and sweeps inward from each edge. The Windows app uses FFmpeg cropdetect on 30 sample frames for video. The browser cropper uses the same histogram on sampled frames, then ffmpeg.wasm to encode.
Only for video in the Windows app: install FFmpeg and add it to your PATH. Image cropping in the app needs no extra dependencies. The browser cropper loads an in-tab FFmpeg engine for video — no PATH install.
The Windows app saves to %USERPROFILE%\Documents\AutoCrop_Output\ — named {original}_cropped.{ext}. The browser cropper downloads to your Downloads folder. Source files are never modified unless you enable Delete Originals in the desktop app.
Images: JPG, PNG, WEBP, BMP, GIF, TIFF (TIFF is desktop-only). Videos: MP4, MOV, MKV, AVI, WEBM, FLV. The browser tool works best with common web formats (JPG/PNG/WEBP/MP4/WEBM). Huge or unusual videos should use the Windows app with FFmpeg on 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 in-browser cropper works on any modern desktop browser, including macOS and Linux. Native installers currently target Windows 10/11 (MSI + NSIS). macOS and Linux packages are planned.
No. The web cropper processes files in your browser tab. They are not sent to AutoCrop Pro servers. Video cropping downloads a local FFmpeg WebAssembly engine once from a public CDN (~25MB, cached after that).
Use the browser for a handful of images or short videos. Use the Windows app for 500+ files, TIFF, WMV/AVI/MKV, huge videos, custom output folders, and delete-originals. The app uses parallel Rust and system FFmpeg.
Crop a few files in your browser, or download AutoCrop Pro for Windows. Drop your files. Get back to actual creative work.
No account. No subscription. MIT license. · Browser cropper on any OS · Native app for Windows 10/11
