Free Tool. Find Related Files

One File Rarely Tells the Whole Story on Its Own

A contract, a client, a project usually has related files scattered across different folders and upload dates. Point to one document and Filex AI surfaces everything else connected to it.

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No credit card required Β· Free plan included

10+
hours saved monthly on manual filing
3 sec
to find any file with AI search
100%
of files organized automatically

Why choose Filex AI

Why Choose Our Free Online Related File Finder?

Files that belong together rarely end up in the same folder by accident. Filex AI connects them by content, not location.

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Connects Files by Content, Not Folder Location

Filex AI identifies shared people, projects, and topics across files, so related documents are surfaced even if they were uploaded months apart and never filed together.

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Works Across Your Whole Library

Related files are found across your entire library rather than being limited to whatever folder the starting document happens to sit in.

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Private and Encrypted

Files are encrypted in transit and at rest, never sold or shared, and never used to train public AI models. Your originals are never modified.

How it works

How to Find Related Files With AI

01

Upload or select a starting file

Choose a contract, client document, or project file you want to find connections for.

02

AI reads its content

Filex AI identifies the people, project, topic, or entities referenced in the file, not just its filename or folder.

03

Related files are surfaced

Every other file in your library sharing those same people, projects, or topics is returned together, regardless of when it was uploaded.

04

Explore or search further

Review the related set, or search within it further to narrow down to exactly what you need.

Supported files

Every Kind of Connection, Surfaced

Whether files share a client, a project, or a topic, Filex AI finds the connection.

Same Person or Client

  • Client contracts and correspondence
  • Family member documents
  • Vendor relationship files

Same Project

  • Project proposals and updates
  • Related deliverables
  • Meeting notes for one initiative

Same Topic

  • Research on one subject
  • Documents about one property
  • Files about one legal matter

Across Upload Dates

  • Files uploaded months apart
  • Documents from different sources
  • Mixed file types on the same subject

Manual vs AI

Searching Folder by Folder vs Letting AI Surface Connections

CapabilityChecking manuallyFilex AI
Find files you remembered to save in the same folder
Find related files uploaded months apart in different foldersNot included
Connect documents by a shared client or project automaticallyNot included
Surface a related file you forgot even existedNot included
Search across your entire library for connections at onceNot included
Find related files across different file typesNot included
Narrow down within a related set by searching furtherNot included
Synced across web, iPhone, and Android automaticallyNot included

Complete guide

The Complete Guide to Finding Related Files With AI

Connecting Files by What They Share, Not Where They Sit

A folder structure only reflects connections that were anticipated and built at the time of filing. It has no way of surfacing a connection nobody thought to create, a client document filed under their name that turns out to be relevant to a project filed separately under the project name.

Filex AI reads the actual content of files, identifying shared people, projects, and topics referenced across them, which allows it to surface connections that exist in the substance of the documents themselves, independent of whatever folder structure happens to already be in place.

Why Searching Only Within a Folder Misses Most Real Connections

A search or review limited to one folder inherently misses connections that live outside it, which is most connections, given how naturally files scatter across a library over time as described above.

Filex AI searches across your entire library for related content, not just the folder a starting document happens to be filed in, so a connection between a contract filed under "Legal" and an invoice filed under "Finance" is still surfaced, since the search is based on content rather than folder boundaries.

Related Files Are Rarely All the Same File Type

The full set of files relevant to one client or project is almost never a single file type, a contract PDF, a spreadsheet budget, a scanned signature page, and an email screenshot can all be genuinely related despite being entirely different formats.

Filex AI surfaces related files regardless of their format, reading content across PDFs, documents, spreadsheets, and images consistently, so a related connection is not missed simply because two files happen to be different types.

Why Privacy Matters When Surfacing Related Files

Finding related files across a whole library requires reading the content of everything in that library well enough to identify shared people, projects, and topics, which is a meaningful depth of access that makes trust in how that content is handled genuinely important.

Filex AI encrypts every file in transit and at rest, keeps files private to your account by default, and never sells, shares, or uses uploaded content to train public AI models. Your original files are never modified as part of finding connections between them.

Related files scatter across a library by default. They only end up together if someone deliberately puts them there, and most of the time, nobody does.

The short version of this guide

Beyond one connection

Finding related files is one lookup. Filex AI groups them automatically going forward.

Surfacing a connection once helps with the file in front of you, but the bigger goal is files staying grouped as they arrive, not needing to be reconnected after the fact. Filex AI groups files by person, project, or entity automatically as they are uploaded. Permanently, across every device.

  • Files grouped by person, project, or entity as they arrive, not just on request
  • One file can belong to multiple relevant groups at once
  • Works across every file type in your library
  • Natural language search across your whole library, synced on web, iPhone & Android
Explore automatic entity-based grouping

Before

Contract_Acme.pdf (filed alone, months ago)

After

4 related files found: invoice, amendment, email scan, meeting notes

  • Related files surfaced across the whole library
  • Connected by shared client, not shared folder
  • Searchable further within the related set

Guides & resources

Learn more from the Filex AI blog

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May 17

Find Related Files FAQ

Everything you need to know about finding related files with AI

Is the Filex AI related file finder really free?

Yes. Every account starts on the free Spark plan with credits to search and organize files, and no credit card is required to start.

How does it know which files are related?

Filex AI reads the content of files to identify shared people, projects, or topics, and surfaces other files in your library that share those same details, rather than relying on folder location or filename.

Can it find related files that were never filed in the same folder?

Yes. That is the specific problem this tool solves. It searches across your entire library for content-based connections, not just within one folder.

Does it work across different file types?

Yes. Related files can be surfaced across PDFs, documents, spreadsheets, and images together, since the connection is based on content rather than file format.

How is this different from group-files-by-person?

Group-files-by-person automatically groups files by entity as part of ongoing organization. Find related files is an on-demand lookup starting from one specific file, surfacing whatever in your library is connected to it right now.

Can it surface a related file I forgot even existed?

Yes. Since the tool works from content rather than requiring you to remember the file yourself, it can surface documents relevant to your current task that you did not think to look for.

Is my data private while it searches for related files?

Yes. Files are encrypted in transit and at rest, are private to your account, and are never sold, shared, or used to train public AI models.

Will it modify my original files while finding connections?

No. Files are only read to identify connections. Your original files are never modified.

Can I search further within a set of related files?

Yes. Once related files are surfaced, you can search within that set further to narrow down to a specific detail or document.

Which devices does this work on?

Filex AI runs on web, iPhone, and Android, with everything synced. A related file search on one device reflects the same library available on every other device.

Find your first related files free

Point to a file and let Filex AI surface everything connected to it in your library. No credit card required.