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About this tool
Track, save and manage your clipboard history with auto-detection and smart categorization.
Clipboard History keeps a running list of the things you have copied, reading the clipboard when you return to the tab if you turn monitoring on, or taking entries you paste in by hand. Each entry is classified automatically as a URL, email address, JSON, code, number, hex colour or plain text, counted for characters and words, and timestamped, with up to 500 entries kept and duplicates promoted to the top rather than repeated. The whole list lives in your browser's local storage on this device.
Open Clipboard History on AltFTool — it loads instantly in your browser.
Click Start Monitor and allow the clipboard permission — the button changes to Monitoring… and the tool re-reads your clipboard every time this tab regains focus, so you can copy in another app and come back. Capture grabs the clipboard once on demand, and if the browser refuses you get Permission denied. Paste content manually below.
Or paste straight into the box above the list and press Add, or hit Ctrl+Enter to quick-add. Each entry is typed automatically as Text, URL, Code, Email, JSON, Number or Color, and its card shows that type, how long ago it was captured and its character count.
Filter with the tab row — All, those seven types and Favorites — or the Search history box, which matches entry content. A card's copy button puts the entry back on your clipboard (Copied to clipboard! confirms it), the star pins it under Favorites, and the ⋮ menu holds Copy and Delete. The Clear button offers Clear non-favorites or Clear everything; everything lives in this browser's local storage, capped at 500 entries with duplicates moved back to the top.
Each entry is tagged URL, email, JSON, code, number, colour or text using pattern checks and a real JSON parse, so you can scan a long list by shape.
Copying the same string again removes the older row and puts it at the top, so the history stays a list of distinct items rather than fifty copies of one link.
Clearing offers a non-favourites option, so you can wipe the day's noise while keeping the entries you starred.
Up to 500. When a new entry pushes the list past that, the oldest one is dropped. Each entry stores the text, its detected type, an ISO timestamp, and its character and word counts.
Browsers do not allow a page to read the clipboard in the background. With monitoring on, the page reads it on window focus and on the tab becoming visible, so copy elsewhere and then click back to this tab to capture. You can also paste anything in manually.
JSON is confirmed by actually parsing the text; code is matched heuristically against patterns such as a leading function/const/class/import keyword, a line ending in a brace or semicolon, an HTML tag, Python's def/print, or an SQL statement keyword. A pure hex value like #14B8A6 is tagged as a colour instead.
No. Entries are written to your browser's local storage under altftool_clipboard_history_data and stay on this device. Because that storage is unencrypted, avoid capturing passwords or one-time codes, and use the clear option when you are finished.