Capture exactly what you need
Capture an entire window, a selected region, or the foreground window. SliCap can detect slide regions automatically.
SLIDE & SCREEN CAPTURE
Never missa screen change.
SliCap is a Windows capture tool that detects changes in slides and streams, then saves them automatically. Capture, OCR, secure redaction, and video processing all happen locally in one app.
GET SLICAPDownload from Microsoft StoreLatest v0.40.6 · Install securely from Microsoft
- ✓ Available in Microsoft Store
- ✓ Windows 10 / 11
- ✓ Local processing
AUTO DETECTED
Auto-saveChange detected
12LOCAL ONLYImages never leave your device
WHAT SLICAP DOES
Capture.
Detect changes and auto-save
Continuously monitor a target window and save only when the screen changes beyond your threshold—ideal for slide advances.
Remove information, not just visibility
Secure redaction discards the original pixels before generating a synthetic texture, removing the underlying information.
OCR and video processing stay local
Text recognition, face and code detection, video tracking, and Whisper transcription all run on your device.
Filter by feature or action
01 / GETTING STARTED
Your first capture
Install SliCap from Microsoft Store, then follow these three steps to get started.
- 1
Choose a target window
Select Refresh list, filter by title or executable, then choose a window. SliCap restores your selection the next time it starts.
- 2
Choose the capture region
Open Select region and drag. Press A to auto-select a slide surrounded by a dark background.
- 3
Copy, save, or start auto-save
C copies and S saves. Select Start auto-save on the main screen to save only when the content changes.
Start with three keys
G Select region A Auto-save Esc Back / minimize to tray
02 / CAPTURE
Four ways
Select region
Capture the selected window, drag to refine the region, then copy, save, run OCR, or redact it.
Save entire window
Immediately save the entire target window when no region review is needed.
Foreground window
Use a global shortcut to capture whichever window is currently in front.
Auto-save
Monitor one window and save only when the change exceeds your threshold.
Region selection controls
- Drag outside for a new selection, drag inside to move it, or resize from an edge or corner
- Choose Free, 16:9, 4:3, 3:2, or 1:1 and switch between landscape and portrait
- X shows a crop preview of the selected region
- Enable Include pop-ups to capture context menus and similar overlays
When capturing pop-ups
SliCap crops this capture from the full screen, so overlapping windows are included. This setting does not apply to auto-save.
03 / AUTO CAPTURE
Save automatically
SliCap checks the target at regular intervals and saves only when the difference between scaled images exceeds your threshold. You can record slide advances without creating duplicate captures.
Capture target→Compare→Detect change→Save image
- Monitoring interval
- 0.5–60 seconds; default: 2 seconds. Shorter intervals respond faster but run more checks.
- Change threshold
- 0.1–100%; default: 2%. Lower values catch subtle changes; higher values reduce unwanted saves.
- Follow slide region
- Redetect the slide region during every auto-save check—useful when a stream moves or resizes the slide.
Designed for long monitoring sessions
SliCap can stay in the system tray, retry after GPU issues, detect unresponsive captures, and recover auto-save after an unexpected exit.
04 / PRIVACY REDACTION
Don’t just obscure it.Remove the information.
Conventional pixelation and blur retain averages of the source pixels. SliCap’s secure modes fill the region with colors derived from its surroundings, discard the original pixels, and draw a synthetic texture on top.
1SelectCover the full head when hiding a face
→2Discard source pixelsRemove information from the selected region
→3Generate the resultCreate a texture that blends with the surroundings
| Mode | Source pixels | Use |
|---|---|---|
| Pixelate (secure) | Discarded | Default; use to remove information |
| Blur (secure) | Discarded | Secure redaction with softer edges |
| Pixelate (visual only; reversible) | Retained | Visual effect only |
| Blur (visual only; reversible) | Retained | Visual effect only |
Redact a still image
- Z opens the redaction editor
- Click vertices or trace the region by dragging
- Click the first point or press Enter to finish
- D auto-detects faces and QR/barcodes
- Adjust each region, then copy or save
Auto-detection is not a final review
It may miss profiles, the backs of heads, shadowed or masked faces, small codes, and vertical text. Always inspect the entire image before publishing it.
05 / VIDEO
Track and redact
SliCap analyzes the full video, tracks detected objects, and interpolates gaps between frames. Drop a video into SliCap or send it from SliStill, then choose video redaction or transcription in SliCap.
- 01Choose a video
Press V to open a file and review detections in the first frame.
- 02Analyze every frame
Choose faces and/or QR/barcodes, the redaction mode, strength, margin, and face threshold, then start analysis.
- 03Correct the results
Seek through the video to review tracks. Delete a selected track or drag to add a manual one. Move that track on another frame to interpolate between keyframes.
- 04Export
P toggles the original and result. When ready, export
<name>_mosaic.mp4.
Required: ffmpeg
winget install Gyan.FFmpeg, or place ffmpeg.exe next to SliCap. Face detection uses the bundled onnxruntime.dll.
06 / OCR & TRANSCRIPTION
Turn image text
IMAGE → TEXT
OCR
Press O in region selection. SliCap recognizes Japanese, English, and Chinese, orders the lines, and copies the result to the clipboard.
- PP-OCRv5 model built into the executable
- No extra download or network connection
- Falls back to Windows OCR if the DLL is unavailable
VIDEO → TEXT
Transcription
Press C on the main screen. Whisper transcribes the video audio and saves <video-name>.txt alongside the video.
- Full text ready for search or summarization
- Press Esc to cancel
- Requires ffmpeg and a GGML model
Review OCR results
Small characters and similar shapes may be misrecognized. Zooming into the source before capture can improve accuracy.
07 / GALLERY
Review and use
Open any image folder—not only the save location. Drop a folder onto the main screen or Gallery, or send a frame folder from SliStill, to show its thumbnails immediately.
- Click to select, Ctrl to add, or Shift to select a range
- Ctrl+A selects all; C copies the selection
- Select a region, auto-select a slide, and review the crop in preview
- Z opens redaction; S overwrites the file with your edits
- Del moves files to the Windows Recycle Bin rather than deleting them permanently
08 / SETTINGS & KEYS
Fit saving and controls
- Save location
- By default, captures are saved to
Pictures\SliCap. You can choose any folder. - Image format
- PNG, BMP, JPEG, or WebP (lossless). PNG and WebP are convenient choices for slides.
- Startup
- SliCap can start minimized to the tray when Windows starts.
- Settings file
%APPDATA%\SliCap\slicap.jsonpersists your settings when the app is updated.
In-app shortcuts
| Screen | Key | Action |
|---|---|---|
| Main screen | R | Refresh window list |
| Main screen | G | Select region |
| Main screen | W | Save entire target window |
| Main screen | T | Open Gallery |
| Main screen | A | Start/stop auto-save |
| Main screen | V | Open video redaction |
| Main screen | C | Transcribe video |
| Region selection | A | Auto-select/clear slide region |
| Region selection | X | Crop preview/restore |
| Region selection | C / S | Copy/save selected region |
| Region selection | O | Run OCR on selected region |
| Region selection | Z | Open redaction editor |
| Redaction | D | Auto-detect faces and QR/barcodes |
| Redaction | Z / Del | Undo/delete selection |
| Video review | P | Toggle result/original |
| Video review | ← / → | Move to previous/next frame |
| Gallery | Ctrl+A | Select all |
| Gallery | C / Del | Copy/move to Recycle Bin |
| Global | Esc | Go back/minimize to tray |
Global shortcuts (defaults)
Ctrl + Alt + CSave selected region
Ctrl + Alt + AStart/stop auto-save
Ctrl + Alt + FSave foreground window
Ctrl + Alt + MShow main window
09 / TROUBLESHOOTING
Troubleshooting
Auto-save is not creating new images
Confirm that a target window is selected and that Monitoring appears at the top. Lower the change threshold for subtle changes, or shorten the monitoring interval for rapid slide advances.
Faces are not detected automatically
The Microsoft Store version includes the components needed for face detection. Profiles, the backs of heads, small faces, and occluded faces may not be detected; add a generous manual region around them.
Video redaction or transcription will not start
Check that ffmpeg -version runs successfully. Transcription also requires ggml-*.bin . Opening Transcription with no model present shows a file picker—choose the file you downloaded.
Windows displays a warning
The official version is available only through Microsoft Store. If Windows warns about an executable obtained elsewhere, do not run it; install SliCap from Microsoft Store instead.
Are images or videos sent anywhere?
The current version makes no external connections, including at startup. OCR, detection, redaction, and transcription are processed on your device.
Where are settings and logs stored?
Settings are stored in %APPDATA%\SliCap\slicap.json; the operation log is slicap.log, and crash records are in panic.log.
Confirm consent and the save location before capture
Do not record or save another person’s screen or meeting without their consent. Saved images are not encrypted. Before publishing, inspect the result for confidential information and anything auto-detection missed.