If you spend enough time in the terminal, you know that grep is a superpower. Need to find an error in a 10,000-line log? grep. Need to isolate a specific IP address? grep.
But what happens when that data leaves the terminal?
As developers, we copy dozens of highly specific strings every single hour:
- UUIDs from database logs
- Bearer tokens from API responses
- AWS ARNs and resource identifiers
- Hex color codes and environment variables
The default macOS clipboard holds exactly one item. If you copy a UUID and then accidentally copy a Slack message right after, that UUID is gone.
Even if you use a standard clipboard manager (like Maccy or Paste) that saves your history, you run into a major limitation: Searchability.
Standard clipboard managers rely on basic substring search. If you know you copied a UUID three hours ago, but you don't remember what the actual random string was, how do you search for it?
You can't.
Bringing Regex & grep to the Clipboard
This exact frustration is why I built L2Cache — a native macOS developer tool and smart clipboard memory layer. I wanted to bring the power of grep and a full regex matcher directly to my clipboard history.
Instead of typing a vague word and hoping the right token appears, you can search your clipboard history using raw regular expressions:
-
Find that UUID from this morning:
^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-... -
Find an IPv4 address:
\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b -
Find bearer tokens / JWTs:
eyJ[A-Za-z0-9-_]+\.eyJ[A-Za-z0-9-_]+\.[A-Za-z0-9-_]+
L2Cache uses a local SQLite database with FTS5 (Full-Text Search), meaning querying a history of 10,000+ clips with complex Regex takes milliseconds.
Built-in Smart Shortcuts
Because nobody wants to write regex for an IPv6 address or a JWT token from memory while coding, L2Cache includes built-in Smart Shortcuts.
By typing / in the search bar, you instantly get quick shortcuts for common developer patterns:
/uuid/jwt/ip/email-
/hex(Color codes) /url
It transforms your clipboard from a dumb scratchpad into a queryable, grep-like database of your daily engineering workflow.
Stop losing your API keys and tokens in the abyss of your clipboard history.
L2Cache is 100% on-device and currently free on the Mac App Store for early access.
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