No upload step
Text and files never leave the Mac for bundled transformations.
Privacy guide
Online converters are convenient. Local tools are safer for real work.
Paste-a-string websites are fine for throwaway samples. For production configs, customer data, tokens, or private keys, a local Mac utility avoids an unnecessary upload. MachKit bundles Codec, Cipher, JSON Formatter, and related tools so those jobs stay on your computer.
Same jobs, offline
Base64, Data URI, JSON, AES/RSA, and related chores without a browser tab.
One install
Searchable utilities share shortcuts, theme, and localization inside MachKit.
What it covers
See the capability and the boundary together.
What online converters quietly require
Most web converters receive your full input in a request or client script context you do not control. Even honest sites create copy-paste risk, history leakage, and third-party script exposure.
- Payload enters a remote origin
- Browser extensions can observe page content
- Harder to audit than a local open-source app
What MachKit does instead
MachKit ships utilities as local bundled content inside a native macOS app. Transformations for Codec and Cipher do not require an account or cloud round trip.
- Open-source MIT licensed app
- No analytics or advertising SDKs
- Optional global shortcuts to the exact tool
Practical next steps
Install MachKit from GitHub Releases, open the Tools workspace, and pin Codec or Cipher if you convert data often.
- Browse /utilities/ for the full catalog
- Open /tools/codec/ for encoding details
- Open /tools/cipher/ for local encrypt/decrypt details
FAQ
FAQ
When is an online converter still okay?
Use them for non-sensitive throwaway examples. Prefer MachKit when the payload could identify a person, system, or secret.
Which MachKit tools replace common converter sites?
Start with Codec for Base64/Data URI/URL encodings, Cipher for AES/RSA/SM crypto, and JSON Formatter for format/minify/query.