Search the content
Find a phrase inside a PDF, Word or Excel file — not just by file name.
Desktop search for Windows
Find any file and email instantly
LumenRay searches inside the content of your documents and your Outlook email, and shows you the exact result —highlighted— in milliseconds. Without opening a single app.
quarterly report
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AllFilesEmailPDFLast month
Quarterly_report_Q2.pdf
…the figures in the quarterly report show 18% growth…
Documents · 3 days ago
RE: Closing the quarterly report
…sending you the revised quarterly report before the meeting…
Outlook · Marta R.
Summary_table_Q2.xlsx
…«quarterly» sheet with the breakdown by region…
Finance · 1 week ago
Meeting_notes.docx
…review the report and send comments…
Documents · yesterday
Quarterly_report_Q2.pdf
C:\Users\Dani\Documents\2026\Quarterly_report_Q2.pdf
Executive summary. The figures in the quarterly report show 18% growth over the previous period, driven by expansion in the Iberian market and improved operating margins…
< 50 ms
Results as you type
100 %
Local, no cloud
7+
Formats and email
0 €
Free forever
Features
One box to find everything
Stop searching separately in File Explorer and Outlook. LumenRay brings your files and email together in one instant search.
Fast as you type
Results appear as you type, feeling instant. Built for speed.
Files and email together
Your Outlook email and its attachments, alongside your local documents, in a single result list.
Preview with highlighting
Read the document without opening it: the preview jumps to the first match and highlights it.
Outlook and .pst files
Indexes your mailbox and also any historical .pst files you add, with their emails and attachments.
Always up to date
Automatic background indexing: it detects changes and keeps your index fresh without you lifting a finger.
Private by design
Everything stays on your computer. Nothing is uploaded and the indexed content is encrypted at rest.
Just a shortcut away
It lives in the system tray and appears instantly with a global keyboard shortcut. Ready when you need it.
Light and efficient
Core written in Rust: modest resource usage and a binary that starts in the blink of an eye.
How it works
Ready in three steps
No servers, no complicated setup. Install it, let it index once, and start searching.
1
Install
Download LumenRay for Windows 11 and open it. No sign-up. Your files are searched offline; indexing your Outlook email requires an internet connection.
2
Index
Choose your folders and email. LumenRay builds the index in the background, just once.
3
Find
Press the shortcut, type a few words and open the exact result. It's that simple.
Compatibility
Reads what you actually use
Indexes the content of the most common office formats and your Outlook email.
PDF
Word
Excel
PowerPoint
TXT
CSV
Outlook email
.pst files
What it's for
The Windows file search that gets straight to the point
LumenRay is a fast alternative to Windows Search and Outlook search. Instead of opening File Explorer and digging through folder after folder, you type what you remember and instantly find the exact document or email — even when the word is inside a PDF, an Excel sheet, a Word document or a PowerPoint presentation.
It works on the real content of your files and your Outlook email, including attachments and historical .pst files. Everything is indexed and searched on your own computer, with nothing sent to the cloud: as private as it is fast.
Privacy
Your data never leaves your computer
LumenRay is a local search tool. No servers, no accounts and nothing sent to the cloud. Your information is yours, full stop.
- No cloud. All indexing and searching happen on your computer.
- Encrypted at rest. The indexed content is protected with on-disk encryption.
- No accounts or tracking. We don't require sign-up or collect usage data.
Download
Start finding today
Download LumenRay free for Windows 11. No account, no strings attached.
Windows 11 64-bit · Manual install and updates · Free version
FAQ
Everything you want to know
Yes. The app is free and requires no account. Later we may add an optional voluntary donation for anyone who wants to support the project, but the search tool will stay free.
No. LumenRay runs 100% locally: it indexes and searches within your own computer. There are no servers or data sent to the cloud, and the index is encrypted at rest.
Windows 11 64-bit. Installation and updates are manual, designed for personal use on your own computer.
Yes. It indexes your Outlook email (Exchange Online) and its attachments, plus historical .pst files you add as a path.
No. The core is written in Rust and indexing runs quietly in the background. Search is optimized to return results as you type.
For now LumenRay is Windows 11 only. We're focused on making the best possible experience on that platform.