Which files it reads
PDF, Word (doc, docx), Excel (xls, xlsx), PowerPoint (ppt, pptx), Hangul (hwp, hwpx), and plain text formats such as txt, md and csv. Hangul files are read without any other software installed.
Search by what is written inside
People do not remember file names. They remember what the document said. CHATDA was built to search that way.
How the index is built
On first run it walks the folders you chose, opening documents and reading their text. On a 100,000-file set that took 22 minutes 23 seconds. You can keep using the PC meanwhile; the search window opens by itself when it is ready.
What you can do with a result
Open the file straight from the result, and see the sentence the match came from with its surrounding text. Moving or deleting files is off by default — a search tool has no business changing your files.
From one PC in daily use
Copied from the maker's work PC on 9 September 2026.
- 105,630
- files indexed
- 74,157
- documents read inside
- 102.5 MB
- index size
- 10 ms
- to find 200+ results
Measured on one machine; your numbers depend on your PC and files. The index never leaves your computer.
Frequently asked questions
Does it read password-protected PDFs?
No. Files it cannot open are indexed by name only.
Does the index contain my document text?
Yes, extracts of it. That is why uninstalling deletes the index by default — nothing is left behind when you hand the PC on.