per node_modules folder
Every project keeps its own copy of its dependencies, even ones you haven't opened in a year.
Clear the clutter your code leaves behind.
node_modules, Xcode build data, package caches and AI models pile up quietly. Molt finds them, explains each one and removes only what you choose.
Free and open source · macOS 15 or later
Your Mac fills up where Finder doesn't look.
Developer tools keep caches and build files in hidden folders. macOS files them under System Data, so you can't tell what's safe to remove.
of Xcode data on a busy Mac
DerivedData and device support grow with every project you build and every iOS version you connect.
per local AI model
Ollama, LM Studio and Hugging Face keep every model you have downloaded until you remove it.
Three steps. No guesswork.
1
Scan
Molt looks only where developer tools keep their files. A scan takes a few seconds.
Xcode4.3 GB
Projects
AI models6.8 GB
2
Review
Each item shows what it is, its size, when it last changed and how to get it back.
node_modulesCaution
Packages installed for a JavaScript project.
Comes back with npm install
3
Clean
Remove what you checked. Anything that can't be rebuilt goes to the Trash first.
All clean14.2 GB freed
Knows where the clutter lives.
More than 30 rules, each written for one kind of file. Every rule says how the file comes back.
Xcode
- DerivedData
- Device Support
- Archives
Rebuilds with your next build. Archives go to the Trash.
Project dependencies
- node_modules
- .venv
- Pods
- target
- .next
Comes back with npm install, pip install or a build.
Package caches
- npm
- pnpm
- Yarn
- Homebrew
- pip
- uv
- Cargo
Downloads again on your next install.
AI models
- Ollama
- LM Studio
- Hugging Face
Download the model again from the app that uses it.
Simulators
- CoreSimulator caches
The Simulator recreates what it needs.
iPhone and iPad
- iOS installers
- device backups
Installers download again. Backups go to the Trash.
App caches
- ~/Library/Caches
Apps recreate them as they need.
Logs
- ~/Library/Logs
Apps write new ones. Old logs aren't needed.
Careful by design.
Molt can only remove what its rules describe. Everything else is off limits.
- Never touches Documents, Photos, Mail, Messages, iCloud or your keychain.
- Checks every file again right before removing it.
- Never asks for an administrator password and stays inside your home folder.
- Nothing is selected until you select it.
Safe
Rebuilds on its own
Removed for good. Your next build or launch recreates it.
Caution
Downloads again
Removed for good. Reinstalling takes a moment and a connection.
Risky
Can't be rebuilt
Moved to the Trash, so you can still change your mind.
A clear view of your disk.
The overview splits your storage by category, like System Settings. Open any category to sort, filter and clean.
- Filter by age to find old projects
- Hide folders you want to keep
- See how much you've freed over time
- English and Turkish
No account. No tracking. No network.
Molt never connects to the internet. The list of your files stays on your Mac.
Open source
Every rule is Swift code you can read on GitHub, licensed under the GPL-3.0.
Read the rulesFree to use. Yours to support.
Every rule, including the ones that need developer tools.
Download MoltInstalls and updates through the App Store, and your purchase funds development. The sandbox limits it to fewer folders.
Coming soonQuestions
Is it safe to delete node_modules?
Yes. It's rebuilt from package.json the next time you run npm install, pnpm install, yarn or bun install. Molt marks it Caution because reinstalling takes a moment and needs a connection.
Why doesn't Molt search my Documents folder?
macOS asks for permission before an app reads Desktop, Documents or Downloads. Molt skips them unless you add a project folder there in Settings, so you never see a surprise prompt.
How is the App Store version different?
It runs in Apple's sandbox, which hides most other apps' caches and doesn't allow developer tools to run. The direct download has every rule.
Does Molt send any data?
No. Molt has no analytics and makes no network requests. Your cleanup history stays on your Mac.
