You can’t remember the file name
Describe it by what’s inside or when you made it — “last year’s financials spreadsheet,” “anything about the contract with Acme” — and Stowlight looks for it.
For Windows · Your PC, OneDrive, and Google Drive
“Where did I
save that file?”
Just ask.
Stowlight finds files on your PC through a conversation with AI. You don’t need to remember the file name — type “the quote I made last month,” and it finds it.
Today, Stowlight is available in Japanese only (Windows 10 and 11). We’re building the English version — join the waitlist and we’ll let you know when it’s ready.
See it in action
This is the current Japanese app. In Japanese, the user asks for “the quote I made last month,” then “just the ones for Yamada Trading,” then “where’s the fire insurance policy?” Recorded in real time on about 9,400 files from a fictional company.
Sound familiar?
You don’t know where you saved it
Desktop, Downloads, OneDrive, Google Drive. Even when your files are scattered, it searches them all at once.
Too many files look alike
Follow up with “just the ones from September,” and it narrows down the previous answer. You can step back to an earlier result at any time.
Features
Search in plain language
Just describe what you’re looking for. The AI searches by file name, folder name, contents, and date — and tells you why each file matched.
See it on a map
Every file on your PC appears as a dot. While it searches, light sweeps across the map and the candidates and answers glow. Click one to open it.
Narrow down and count
Keep refining with “of those, …” one step at a time. Ask “how many images are there?” and get the count and breakdown right away.
Add-on
Sensitive-file inventory
Finds files that contain ID numbers, card numbers, bank account numbers, passwords, and more, and marks them in red on the map. Move them to a safe folder or to the Recycle Bin right there. The check runs only on your PC — nothing is sent to the AI or to our server.
Be prepared for the unexpected
Stay calm and ready when a disaster or a cyberattack hits.
In an emergency, one sentence finds it
Right after a disaster or an accident, it’s hard to think straight — you can’t recall the file name or where you saved it. With Stowlight, you just type whatever comes to mind. It uses names, contents, and dates to find the file fast.
- “Where’s the fire insurance policy?”
- “Show me the staff emergency contact list.”
- “The latest contract with our supplier.”
Searching in plain language requires an internet connection. The map and the sensitive-file inventory work entirely on your PC.
Find sensitive data before an attacker does
If someone ever breaks into your PC, the damage grows with every piece of sensitive data you didn’t know was there. The sensitive-file inventory scans your PC and synced folders in one pass and pinpoints files that contain information like this:
- Japan’s My Number (national ID)
- Credit card numbers
- Bank account numbers
- Passwords in spreadsheets or notes
- API keys and credential files
- FindDetects them from digit patterns and nearby words (My Number and card numbers are verified down to the check digit)
- See whereRed dots on the map show at a glance how scattered they are
- ActMove to a safe folder, move to the Recycle Bin, or exclude from the check — right there
The check runs only on your PC. Values it finds are shown masked and are never sent to the AI or our server. After the first run, it re-reads only files that have changed, so it works well for regular check-ups. There are limits: for files stored only in the cloud, for example, it judges by the file name.
How it works, and how your files stay private
The search happens on your PC. Finding files and opening them to read happen entirely on your computer. Stowlight never uploads whole files to the cloud.
- The AI receives your request and the name, location, date, and size of the files found It reads a file’s contents only when it needs to check a candidate — and then only the beginning (usually up to 1,500 characters).
- Folders you exclude stay private — names and contents Choose “folders to exclude from search” in the settings.
- See exactly what was sent to the AI, any time The app lists everything it sent, exactly as it was sent.
- Our server keeps only when you used it and how much We don’t store your requests, search results, or file contents. The AI is Claude, by Anthropic (USA).
- The sensitive-file inventory runs entirely on your PC Values it finds are shown masked and are never sent anywhere.
Pricing
These are the current prices for the Japanese version in Japan (in yen, tax included). Pricing for the English version will be announced before launch.
Standard
¥1,980 / month (tax incl.)
- Search in plain language, see the map, narrow down, and count
- Your PC, OneDrive, and Google Drive (synced folders)
- Sensitive-file inventory: shows the number and types found
- Monthly usage cap (roughly 2,000 searches — you’re unlikely to reach it in normal use)
Add-on
Sensitive-file inventory
+¥500 / month (tax incl.)
- A list of the files found, with the matching parts (masked)
- Move to a safe folder, move to the Recycle Bin, or exclude from the check
- Included free during the 14-day trial
Add it with Standard. You can add or remove it any time; the difference is prorated by day.
The Japanese version comes with a 14-day free trial — no credit card required, and you’re never charged automatically when it ends. Payment is by credit card (Stripe). You can cancel any time and keep using it until the end of the period you’ve paid for.
Join the English waitlist
We’re building an English version of Stowlight. Leave your email and we’ll let you know when it’s ready — including pricing, before launch.
Read Japanese? The Japanese version is available now with a 14-day free trial — download it from the Japanese page.
Questions
Is there an English version?
Not yet. Today, the app’s screens, emails, and billing are in Japanese, with prices in yen. We’re building an English version. Join the waitlist and we’ll email you when it’s ready, and we’ll announce English pricing before launch.
Are my files’ contents sent to the AI?
The search runs on your PC. The AI receives your request and the name, location, date, and size of the files found. It reads a file’s contents only when it needs to check a candidate, and then only the beginning (usually up to 1,500 characters). You can exclude folders from search in the settings, and the app shows you everything it sent to the AI.
Which AI does Stowlight use, and what does your server keep?
Stowlight uses Claude, by Anthropic (USA). Our server keeps only when you used it and how much. It doesn’t store your requests, search results, or file contents.
Does it work on a Mac?
Not right now. Stowlight runs on Windows 10 and 11.
What if I have a huge number of files?
We’ve tested it on PCs with about 100,000 files. The first run takes a few minutes to build the file list. After that, it re-reads only what has changed, so it’s ready right away.
Does it work offline?
Searching in plain language (using the AI) requires an internet connection. The map and the sensitive-file inventory work entirely on your PC.
Can I try the Japanese version now?
Yes, if you’re comfortable with a Japanese interface. Download it from the Japanese page and sign in with your email for a 14-day free trial. No credit card is required, and you’re never charged automatically when the trial ends.
What do you do with my waitlist sign-up?
We use your email only to tell you about the English version, and we read the optional “what would you use it for” answers to understand demand. This site uses no cookies and no third-party analytics. To be removed, email info@stowlight.com. See the waitlist privacy notice for details.
Spend less time searching, and more time working.
Be the first to know when Stowlight is available in English.
Join the waitlist