23 tools. Type to filter, or pick a category.
Find any tool by typing
Knack's Home window opens on a search field above every tool. Type a file type, a job or a name and the grid narrows as you type, or pick a category: AI, Image, PDF, Audio, Video, Utility or Productivity.
Pick a format, convert the whole batch
Image Converter reads PNG, JPEG, HEIC, WebP, TIFF, GIF, BMP and PDF and writes any of them. Set the quality, cap the longest side, keep or strip metadata, and the copies land next to your originals.
Free forever Pick a format and press Convert. A PNG of a phone photo comes out larger; JPEG and WebP come out smaller.
Format
Quality
Resize
OffKeep metadata
EXIF · GPS · color profileCombine into one PDF
Pages in list orderOutput folder
Press Convert to make JPEG copies.
Lift the subject off any background
AI Background Remover finds the subject and hands back a transparent PNG, or puts it on a colour of your choice. Drop in one photo or a whole folder.
Pro Drag the handle, or focus it and use the arrow keys.
Right-click, and it's done
Switch on Knack's Finder actions once in Settings. Then right-click an image and choose a Knack action under Services. Knack comes forward on the right tool and gets started: remove the background, compress, convert or extract the text.
Open in Knack… lists only the tools that fit what you picked. Click a file here to try it.
Open in
Click a file to open its menu.
Your Mac's vitals, one menu bar item each
System Stats gives every metric you switch on its own menu bar item: CPU, memory, network down or up, disk and battery. Click one for its own detail. CPU shows the busiest processes and how hard the performance and efficiency cores are working; memory shows what is using it.
Pro Pick the metrics and one of four styles in Settings. Try the styles below.
Click a menu bar item to open its detail.
Preview the tidy, then apply it
Tidy Folders sorts a folder by type, month or size. It shows the plan before anything moves, Apply does the moving, and Undo puts every file back.
Pro Preview · 12 moves into 5 folders.
Twenty-three tools, one app
Eleven are free forever. Knack Pro adds twelve more. Every one runs on your Mac.
Image Converter Free forever
PNG, JPEG, HEIC, WebP, TIFF, GIF, BMP and PDF, in batches, resized on the way.
Image Compressor Free forever
Shrinks PNGs and JPEGs, lossless or with smart compression.
Image Upscaler Free forever
Enlarges photos 2× or 4× with a neural model.
Photo Enhance Free forever
Denoises and sharpens a photo in one pass.
Face Restoration Free forever
Brings back detail in old or blurry portraits.
Color Palette Free forever
Pulls the dominant colours out of any image.
Color Picker Free forever
An eyedropper for any pixel on your screen.
QR Code Generator Free forever
QR codes for links, Wi-Fi and plain text.
Video Converter Free forever
MP4 (H.264), HEVC, MOV, or just the audio.
Audio Converter Free forever
M4A, WAV, AIFF or CAF, and pulls the soundtrack out of a video.
Cleaning Lock Free forever
Locks the keyboard and trackpad while you wipe them down.
AI Background Remover Pro
Transparent PNG or a colour background, one photo or a batch.
Smart Crop Pro
Crops to social ratios around what matters in the frame.
Document Scanner Pro
Auto-crops, deskews and removes shadows, then merges pages into one PDF.
Portrait Depth Pro
Blurs and relights the background of a portrait.
Colorize B&W Pro
Adds colour to black and white photos.
Transcribe Pro
Whisper on your Mac turns audio into text, SRT or VTT.
App Store Screenshots Pro
Designs store screenshots around your raw captures.
App Icon Generator Pro
macOS, iOS, Android and web icon sets from one image.
PDF Toolkit Pro
Merges, splits, extracts pages from and compresses PDFs.
Text Extractor Pro
Copies the text out of images and PDFs.
Tidy Folders Pro
Sorts a folder by type, date or size, with a preview and one-click undo.
System Stats Pro
Live CPU, memory, network, disk and battery in the menu bar.
- Native SwiftUINo Electron, no web views. Built for Apple silicon, so it opens fast and feels like macOS.
- Stays on your MacYour files are processed on your Mac and never uploaded. Knack sends anonymous usage counts and crash reports, and one switch in Settings turns them off. Privacy policy
- Sandboxed by AppleSold on the Mac App Store, reviewed by Apple and sandboxed. It asks once before saving next to your originals.
- 12 Pro tools: background remover, PDF, OCR, transcription and more
- Follows your Apple ID to every Mac
- Every future Pro tool included
11 tools free forever
Knack is a free download. Pro is one in-app purchase when you want the rest, and these stay free forever:
- Image Converter
- Image Compressor
- Image Upscaler
- Photo Enhance
- Face Restoration
- Color Palette
- Color Picker
- QR Code Generator
- Video Converter
- Audio Converter
- Cleaning Lock
Make it the last one.
11 tools free forever. Knack Pro adds 12 more for $4.99 once, on every Mac you sign in to.
macOS 15 or later · Apple silicon · Sold and updated through the Mac App Store