Blog
Guides and updates from LocalSynapse
Why an Update Made Our App Re-Index Everything — and How We Made Sure It Can't Happen Quietly
A correctness fix in one release silently invalidated every embedding users had already computed, so the app started over. Here is the mechanism behind that class of bug, why it is easy to ship by accident, and what now stands in the way.
Why Your Search Tool Keeps Re-Scanning the Whole Drive (and What It Should Do Instead)
A desktop search tool that walks every folder on a schedule burns CPU and disk for almost no new information. Here is why that design is so common, what it costs, and how LocalSynapse decides what to look at now.
Giving Hermes Agent Access to Your Own Files
If you already run Hermes Agent, adding a local document search server is a few lines in your config. Here is the entry, the tool-filtering option that matters when a server exposes nine tools, and what the responses look like — plus a plain statement of what we have and have not verified.
Claude Desktop Alone vs Claude Desktop With Local Search: An Honest Comparison
What actually changes when you give Claude the ability to search your own files — and what does not. Where each setup wins, what it costs, and the failure mode you should test for before trusting either.
What You Can Actually Ask Claude Once It Can Read Your Files
Five real scenarios — a contract question, a half-remembered email, a spreadsheet figure, a version history, and a question with no good answer — showing what you type, what comes back, and how to steer it when the first attempt is too broad.
Running an MCP Server Without Keeping the Desktop App Open
A local MCP connector that only lives while a desktop window is open forces you to keep a full application resident just so an AI agent keeps working. Here is why that happens, what it costs, and how LocalSynapse runs the connector as its own process — with the config, the process model, and what a response actually looks like.
We Deleted Our GPU Speed Claims Instead of Fixing Them
Our app shipped copy promising GPU acceleration. On plenty of machines with healthy graphics cards, the GPU never attached. Here is why that is harder than it looks, and why we removed the promise rather than keep it while we work on it.
Local RAG MCP Servers Compared (2026): Which One Reads Your Office Files?
Most local RAG MCP servers are built for developers and handle mainly PDF, TXT, and Markdown. If you want an AI agent to search your Office files on Windows without a developer toolchain, here's how the options compare.
How Fast Is Offline Local Document Search? Real Benchmarks
Real benchmarks for offline local document search — a 93 GiB working drive (68,877 files) indexed on a mid-range Intel i5 desktop with no discrete GPU. Search latency, index footprint, extraction speed, RAM.
What AI Agents See When They Search Your Local Files
AI agents like Claude can search your local documents via MCP — without uploading anything. Here is what the workflow actually looks like, step by step.
Why Your Search Tool Only Finds Half Your Work
Keyword search misses synonyms, cross-language matches, abbreviations, and conceptual connections. Here is what it can not find — and what can.
Your Work Has a Story. Your File Search Should Tell It.
Files are created, edited, emailed, and revised in sequence. Timeline reconstructs that sequence — showing how your work unfolded over days, weeks, and months.
One Search Across Every Format on Your PC — Word, Excel, PDF, and Beyond
Your work lives in Word docs, Excel sheets, PDFs, and email. Why are you searching them one app at a time? Unified cross-format search finds everything in one query.
You Remember the Idea, Not the Filename — How AI Search Finds Files by Meaning
Keyword search fails when you remember concepts, not exact words. Semantic search finds files by meaning — across languages, synonyms, and fuzzy memory.
How to Search Inside Files on Windows 11 (Built-in vs Better Options)
Windows 11 Search finds filenames, not file contents. Compare built-in options with tools that actually search inside Word, Excel, and PDF files.
How to Find Old Emails and Attachments on Your Computer
Lost an email attachment you downloaded months ago? Here is how to find old emails and their attachments on your computer — in Outlook, Gmail, or with local search tools.
v2.5.3 — Indexing Is 5.6x Faster. Here's What We Found.
A single 45MB Excel file was consuming 85% of indexing time. After diagnosing the root cause, total indexing dropped from 171 minutes to 30.8 minutes for 6,500+ files.
How to Search Inside PDF Files on Windows (4 Methods)
Find text inside PDF documents on Windows without opening each file. Compare built-in tools, Adobe Acrobat, and dedicated search software.
Windows Search Not Finding Files? Here's Why and What to Use Instead
Windows Search misses files, returns incomplete results, or is painfully slow. Understand why it fails and which alternatives actually work.
What Is the Best File Search Tool for Windows in 2026? (Honest Comparison)
A practical comparison of the best Windows file search tools in 2026: Everything, Windows Search, Listary, AnyTXT, and LocalSynapse. When to use which.
How to Find a File by What's Inside It on Windows (Without Knowing the Filename)
You remember writing it but forgot what you named it. Here are the four ways to find a file on Windows by its content — including the one that actually works for Word and PDF.
Search Just Got Smarter — v2.5 Update
LocalSynapse v2.5 adds phrase search, word boundary boost, RTF/ODT support, and click learning. Here's what changed and why it matters.
How to Install LocalSynapse on macOS (Gatekeeper Workaround)
macOS may show a Gatekeeper warning when you open LocalSynapse for the first time. Here are two ways to bypass it safely — without disabling your Mac's security.
Why LocalSynapse Skips Your OneDrive Files (And How to Fix It)
OneDrive, Google Drive, and iCloud use placeholder files that look real but contain no data. Here's why local search tools skip them, and how to make your cloud files searchable.
How to Search Inside Files on Mac: Spotlight vs AI-Powered Search
Spotlight finds filenames fast, but can't search inside Word or Excel documents reliably. Here are better alternatives for searching file contents on macOS.
Search Got a Lot Faster — v1.0.2 & v1.0.3 Update
Two quick patches shipped this week. Both focus on the same thing: making search actually feel instant.
LocalSynapse v1.0.1 — Your Download Is Finally Here
Thank you for waiting. Today, the first public version is ready for you.
How to Find a Word Document by What's Inside It (Not the Filename)
You know you wrote it — but can't remember what you named it. Here's how to search inside Word documents on Windows by content, not just filenames.
The Email Attachment Mess: Why Your Files Are in Three Places at Once
That contract lives in your inbox, your Downloads folder, AND your project drive. Here's how to stop losing track of which version is where.
Every AI Tool Requires the Cloud. What About the Rest of Us?
AI is transforming how people work — if you're allowed to use cloud services. For millions of Windows users in restricted environments, the AI revolution is happening somewhere else.
How to Search Inside Files on Windows: 5 Methods Compared
Search within files on Windows: 5 methods compared from File Explorer to AI-powered search. Find documents by content, not just filenames.
Everything Search Alternatives That Actually Read Your Files (2026)
Everything Search is fast at filenames but can't search inside Word, Excel, or PDF files. Here are 3 alternatives that actually read file contents — free, offline, no email required.
Give Your AI Agent a Local Memory: MCP Server for File Search
AI agents can't see your local files. LocalSynapse's built-in MCP server lets AI search across 13+ document formats — completely offline.