# StrongFolder

> StrongFolder is a free browser tool for sending large files and whole folders directly from one device to another over a peer-to-peer (WebRTC) connection. Files are not uploaded to or stored on a server, there is no file size limit set by the service, folders keep their structure without zipping, and the recipient needs only a link — no account and no app.

- Price: StrongFolder is free. There are no paid plans at the moment — every feature is available to everyone. No account needed to send or receive. Signing in with Google is optional and keeps a list of your transfers.
- How it works: WebRTC data channels (peer-to-peer) between the sender's and the recipient's browsers. WebRTC encrypts every data channel with DTLS, so the file stream is encrypted in transit on every connection.
- Storage: Files are never uploaded to or stored on a StrongFolder server. To create the link, the service keeps transfer metadata: file and folder names, sizes and the number of files.
- Relay: If a direct connection is impossible (strict corporate firewall, some mobile networks), the encrypted stream passes through a StrongFolder relay (TURN) server. The relay forwards the data and does not store it.
- Size: No size limit set by StrongFolder. The practical limits are free disk space on the recipient's device, connection speed, and how long both devices stay online.
- Folders: Folders are sent as folders: subfolders and file names are kept, nothing is zipped. Saving a whole folder with its structure uses the File System Access API: Chrome, Edge, Opera and other Chromium browsers on a computer. Other browsers can download the files one by one or as a ZIP.
- Trade-off: The sender's browser tab must stay open and online until the recipient finishes downloading — files come from the sender's device, not from a server.
- Recipients: One link can be opened by several recipients; each downloads directly from the sender. The link works while the sender keeps sharing. When the sender clicks Stop Sharing or closes the tab, the files are no longer available.
- Ways to use: web app https://strongfolder.com, Chrome extension https://chromewebstore.google.com/detail/strongfolder-file-share/oengjokifmfipnadbkffkaldkcpcmekc.
- Contact: info@strongfolder.com

## Product

- [StrongFolder — Send Large Files & Folders Directly, Free](https://help.strongfolder.com/en/): Send large files and whole folders straight from your browser to theirs. Peer-to-peer, no upload, no size limit, no account. Free web app and Chrome extension.
- [About StrongFolder: Why We Built Direct File Sharing](https://help.strongfolder.com/en/about/): StrongFolder was built to send large files and whole folders without cloud limits, compression or zipping. Our mission, values, founder and how to contact us.
- [StrongFolder Chrome Extension: P2P File Sharing in Your Browser](https://help.strongfolder.com/en/chrome-extension/): The free StrongFolder — File Share extension for Chrome sends large files and whole folders from your browser toolbar. Peer-to-peer, no upload, no size limit.
- [Cookie Policy | StrongFolder](https://help.strongfolder.com/en/cookie-policy/): Which cookies help.strongfolder.com uses, why, and how to change your choice: cookieless Umami statistics, Google Analytics and Meta Pixel only with consent.
- [StrongFolder FAQ: Size Limits, Privacy, Folders, Browsers](https://help.strongfolder.com/en/faq/): Answers about StrongFolder: is it free, is there a size limit, are files stored, how folders are sent, which browsers work, why the tab must stay open, and more.
- [File Transfer Glossary: P2P, WebRTC, STUN, TURN, NAT](https://help.strongfolder.com/en/glossary/): Plain-English definitions of the terms behind direct file transfer: P2P, WebRTC, signaling, ICE, STUN, TURN, NAT, DTLS, end-to-end encryption and more.
- [How StrongFolder Works: Direct Browser-to-Browser Transfer](https://help.strongfolder.com/en/how-it-works/): How StrongFolder sends files and folders directly between browsers: an encrypted WebRTC connection, no upload and no storage. Step by step, behind the link.
- [StrongFolder Limits & Requirements: Size, Browsers, Folders](https://help.strongfolder.com/en/limits/): Is there a file size limit? Which browsers work? What does the recipient need to save a whole folder? Every StrongFolder limit and requirement on one page.
- [Privacy Policy | StrongFolder](https://help.strongfolder.com/en/privacy-policy/): StrongFolder's Privacy Policy: what data we collect when you use our website, web app and Chrome extension, how we use and protect it, and your rights.
- [StrongFolder Security & Privacy: Where Your Files Go](https://help.strongfolder.com/en/security/): Where do your files go with StrongFolder? Encrypted WebRTC transfer, no storage on servers, the metadata we keep, the relay fallback and how to share safely.
- [Terms of Use | StrongFolder](https://help.strongfolder.com/en/terms-of-use/): StrongFolder Terms of Use: the rules, rights and responsibilities that apply when you use our website, web application, Chrome extension and related services.
- [StrongFolder Use Cases: Who Sends Files Directly](https://help.strongfolder.com/en/use-cases/): How families, video creators, photographers, gamers, architects, teachers and developers use StrongFolder to send large files and whole folders directly.

## Guides

- [File Transfer Guides: Large Files, Folders, P2P, Security](https://help.strongfolder.com/en/guides/): Practical guides to sending large files and whole folders: every method compared, P2P vs cloud, secure sharing, video, photos, CAD and game files, device to device.
- [Advanced File Transfer: What It Means and Free Options](https://help.strongfolder.com/en/guides/advanced-file-transfer/): Advanced file transfer explained: huge files, whole folders, several recipients, direct links and QR codes with no account — and when you need enterprise MFT.
- [AirDrop for Windows and Android: Best Alternatives | StrongFolder](https://help.strongfolder.com/en/guides/airdrop-alternative-windows-android/): Looking for AirDrop for Windows or an AirDrop alternative for Android? Compare Quick Share, Phone Link, LocalSend, PairDrop, Send Anywhere and StrongFolder.
- [Email Attachment Size Limits: Gmail, Outlook, iCloud, Yahoo](https://help.strongfolder.com/en/guides/email-attachment-size-limits/): Email attachment size limits for Gmail, Outlook.com, iCloud Mail, Yahoo and Proton Mail in one table, why files under the limit still bounce, and workarounds.
- [How WebRTC File Transfer Works: STUN, TURN, ICE | StrongFolder](https://help.strongfolder.com/en/guides/how-webrtc-file-transfer-works/): How WebRTC file transfer works, step by step: signaling, NAT, STUN, ICE, TURN relays, DTLS encryption and data channels, explained in plain language.
- [How to Transfer Files from Mac to Windows (6 Ways) | StrongFolder](https://help.strongfolder.com/en/guides/mac-to-windows-file-transfer/): Transfer files from Mac to Windows: browser link, SMB sharing, exFAT drive, cloud or LocalSend — plus the file name, path length and format issues to fix first.
- [P2P File Sharing in the Browser: How It Works | StrongFolder](https://help.strongfolder.com/en/guides/p2p-file-transfer/): P2P file sharing explained: how browser-to-browser transfer works, what a server still does, how it differs from cloud and BitTorrent, and when to use it.
- [P2P vs Cloud File Transfer: Pros, Cons, When to Use](https://help.strongfolder.com/en/guides/p2p-vs-cloud-file-transfer/): P2P vs cloud file transfer compared honestly: upload time, storage, size limits, privacy, offline access, and how P2P differs from end-to-end encrypted cloud.
- [Transfer Files Between PC and Phone Without a Cable](https://help.strongfolder.com/en/guides/pc-to-phone-file-transfer/): Share files between PC and phone without a cable: scan a QR code, use Quick Share, Phone Link, LocalSend or the cloud. Steps, limits and phone browser tips.
- [Secure File Sharing: What Secure File Transfer Means](https://help.strongfolder.com/en/guides/secure-file-sharing/): Secure file sharing explained: encryption in transit and at rest, access, retention, a checklist, and how email, cloud, SFTP and P2P file transfer compare.
- [How to Send a 100 GB File for Free (Real Upload Times)](https://help.strongfolder.com/en/guides/send-100gb-file-free/): Send a 100 GB file free: which services accept it, how long it really takes at your upload speed, and how to prepare so a transfer of many hours finishes.
- [How to Send CAD and BIM Files Without Breaking References](https://help.strongfolder.com/en/guides/send-cad-files/): Send CAD and BIM project folders — AutoCAD xrefs, Revit links, SolidWorks assemblies — with folder structure and relative paths intact. No ZIP, no upload.
- [How to Transfer Files Without Uploading Them to the Cloud](https://help.strongfolder.com/en/guides/send-files-without-uploading/): Transfer files without uploading them to a cloud: direct browser-to-browser P2P, local sharing, cables and drives compared, and when a cloud is still better.
- [How to Send a Folder Without Zipping It (Keep Subfolders)](https://help.strongfolder.com/en/guides/send-folder-without-zipping/): Send a whole folder with all subfolders and file names intact — no ZIP, no upload. Compare email, Google Drive, Dropbox, WeTransfer and direct P2P transfer.
- [How to Send Large Documents and PDFs: 6 Ways Compared](https://help.strongfolder.com/en/guides/send-large-documents/): How to send large documents and PDFs that are too big for email: compress, cloud links, transfer services and direct P2P transfer compared, with real limits.
- [How to Send Large Files: Every Method Compared (2026)](https://help.strongfolder.com/en/guides/send-large-files/): How to send large files for free: email, Google Drive, Dropbox, WeTransfer, messengers, P2P and USB drives compared by size limit, time, privacy and cost.
- [How to Send Large Video Files Without Losing Quality](https://help.strongfolder.com/en/guides/send-large-video-files/): How to send large video files in full quality from a phone or computer: why apps compress video, real file sizes, and every method compared, including P2P.
- [How to Send RAW Photos to Clients in Full Resolution](https://help.strongfolder.com/en/guides/send-raw-photos/): Send RAW photos and full-resolution JPEGs to clients as organized folders — no compression, no ZIP, no upload. Galleries, cloud drives and P2P compared.
- [How to Share Game Files, Mods, Saves and Builds | StrongFolder](https://help.strongfolder.com/en/guides/share-game-files/): Share game files: mod packs, save files, worlds and game builds sent as folders from your browser — no ZIP, no upload, no size cap set by the service.
- [How to Share Large Video Files (4K Footage & Projects)](https://help.strongfolder.com/en/guides/share-large-video-files/): Share large video files and whole 4K/8K project folders with editors and clients in full quality — no recompression, no upload wait. Every method compared.
- [Why the Sender Must Stay Online in P2P File Transfer](https://help.strongfolder.com/en/guides/why-sender-stays-online/): Why the sender must stay online in P2P file transfer, how long to plan for, how to keep Windows, macOS and your browser awake, and what to use when you can't.

## Comparisons

- [File Transfer Tools Compared: Free Limits, P2P vs Cloud](https://help.strongfolder.com/en/compare/): Honest comparisons of file transfer tools: WeTransfer alternatives, P2P tools, and StrongFolder vs WeTransfer, Google Drive, Smash, Send Anywhere and FilePizza.
- [Best P2P File Transfer Tools (2026): Browser and Apps](https://help.strongfolder.com/en/compare/best-p2p-file-transfer-tools/): Best P2P file transfer tools compared: StrongFolder, FilePizza, ToffeeShare, ShareDrop, PairDrop, LocalSend, Send Anywhere, Wormhole — LAN vs internet, folders.
- [FilePizza Alternatives (2026): Browser P2P Tools Compared](https://help.strongfolder.com/en/compare/filepizza-alternatives/): FilePizza alternatives compared from each project's own pages: StrongFolder, ToffeeShare, PairDrop, Wormhole, croc, Magic Wormhole, LocalSend — folders, limits.
- [Free File Transfer Sites (2026): No Sign-Up, Big Limits](https://help.strongfolder.com/en/compare/free-file-transfer-sites/): 14 free file transfer sites compared from vendors' own pages: size limits, how long files are kept, sign-up, folders, P2P or cloud — and which to pick when.
- [Snapdrop & ShareDrop Alternatives (2026) After LimeWire](https://help.strongfolder.com/en/compare/snapdrop-alternatives/): Snapdrop and ShareDrop now upload to LimeWire storage. Alternatives compared: PairDrop, LocalSend, Quick Share, StrongFolder and the self-hosted classic.
- [StrongFolder vs Dropbox: Share Links, Transfer, Folders](https://help.strongfolder.com/en/compare/strongfolder-vs-dropbox/): StrongFolder vs Dropbox for large files: 2 GB free storage, Dropbox Transfer limits, ZIP folder downloads, accounts — and when Dropbox is the better choice.
- [StrongFolder vs Filemail: Free Limits, Folders, Storage](https://help.strongfolder.com/en/compare/strongfolder-vs-filemail/): StrongFolder vs Filemail compared: free 5 GB and 2-transfers-a-day limits, 7-day storage, folders, desktop apps — and when Filemail is the better choice.
- [StrongFolder vs FilePizza: Browser P2P File Transfer](https://help.strongfolder.com/en/compare/strongfolder-vs-filepizza/): StrongFolder vs FilePizza: two browser-to-browser P2P file transfer tools compared — folders vs ZIP, open source and self-hosting, passwords, extension, relay.
- [StrongFolder vs Google Drive: Send Large Files and Folders](https://help.strongfolder.com/en/compare/strongfolder-vs-google-drive/): StrongFolder vs Google Drive for sending large files and folders: storage quota, upload wait, ZIP downloads, accounts — and when Drive is the better choice.
- [StrongFolder vs LocalSend: LAN App or Browser Link](https://help.strongfolder.com/en/compare/strongfolder-vs-localsend/): StrongFolder vs LocalSend: an open-source app for the same Wi-Fi vs a browser link that works across the internet: install, folders, offline use, encryption.
- [StrongFolder vs MASV: Free P2P vs Managed Media Transfer](https://help.strongfolder.com/en/compare/strongfolder-vs-masv/): StrongFolder vs MASV for large video and media files: free tier, pricing model, storage, folders, security certifications, integrations — and when MASV wins.
- [StrongFolder vs MEGA: Encrypted Cloud vs Direct Transfer](https://help.strongfolder.com/en/compare/strongfolder-vs-mega/): StrongFolder vs MEGA compared: 20 GB free storage, transfer quota, end-to-end encryption, folder downloads, Transfer.it — and when MEGA is the better choice.
- [StrongFolder vs OneDrive: Send Large Files and Folders](https://help.strongfolder.com/en/compare/strongfolder-vs-onedrive/): StrongFolder vs OneDrive for large files: 5 GB free storage, Outlook attachments via OneDrive, ZIP download limits — and when OneDrive is the better choice.
- [StrongFolder vs PairDrop & Snapdrop](https://help.strongfolder.com/en/compare/strongfolder-vs-pairdrop/): StrongFolder vs PairDrop and Snapdrop: AirDrop-style local sharing in the browser vs a link that works across the internet — folders, rooms, pairing and relays.
- [StrongFolder vs Send Anywhere: P2P Transfer Compared](https://help.strongfolder.com/en/compare/strongfolder-vs-send-anywhere/): StrongFolder vs Send Anywhere: 6-digit key vs link, size limits, 48-hour links, apps vs browser, folders — and when Send Anywhere is the better choice.
- [StrongFolder vs Smash: Free Large File Transfer Compared](https://help.strongfolder.com/en/compare/strongfolder-vs-smash/): StrongFolder vs Smash for free large file transfer: size and queue, how long files are kept, folders, storage and privacy — and when Smash is the better choice.
- [StrongFolder vs SwissTransfer: 50 GB Limit, Folders, Privacy](https://help.strongfolder.com/en/compare/strongfolder-vs-swisstransfer/): StrongFolder vs SwissTransfer: free 50 GB limit, 30-day validity, ZIP downloads, Swiss storage and accounts — and when SwissTransfer is the better choice.
- [StrongFolder vs ToffeeShare: P2P Files and Folders](https://help.strongfolder.com/en/compare/strongfolder-vs-toffeeshare/): StrongFolder vs ToffeeShare: two free browser P2P file transfer tools compared on folders vs zipping, relay, apps, Safari limits and when ToffeeShare fits best.
- [StrongFolder vs TransferNow: Free Limits and Folders](https://help.strongfolder.com/en/compare/strongfolder-vs-transfernow/): StrongFolder vs TransferNow: free 5 GB limit, 7-day retention, folders, accounts and where files are stored — and when TransferNow is the better choice.
- [StrongFolder vs Tresorit Send: E2EE Cloud or P2P](https://help.strongfolder.com/en/compare/strongfolder-vs-tresorit-send/): StrongFolder vs Tresorit Send: end-to-end encrypted cloud links (5 GB, 7 days, 10 downloads) vs direct P2P transfer with no storage and no service size limit.
- [StrongFolder vs WeTransfer: Free Limits, Folders, Privacy](https://help.strongfolder.com/en/compare/strongfolder-vs-wetransfer/): StrongFolder vs WeTransfer compared: free size limits, expiry, accounts, folders and where files are stored — plus when WeTransfer is the better choice.
- [StrongFolder vs Wormhole: Encrypted Cloud or Direct](https://help.strongfolder.com/en/compare/strongfolder-vs-wormhole/): StrongFolder vs Wormhole: 10 GB end-to-end encrypted sharing with 24-hour storage vs direct browser transfer with no storage, no service size limit and folders.
- [Best WeTransfer Alternatives (2026): Free Limits Compared](https://help.strongfolder.com/en/compare/wetransfer-alternatives/): 11 free WeTransfer alternatives compared from vendors' own pages: size limits, how long files are kept, accounts, folders, P2P or cloud — and when to use each.

## Blog

- [StrongFolder Blog: Product Story and Updates](https://help.strongfolder.com/en/blog/): News and stories from the StrongFolder team: why we built a peer-to-peer file sharing tool, what makes it different, and why it lives in your browser.
- [Folders Deserve Better Than ZIP: Stop Zipping to Share](https://help.strongfolder.com/en/blog/folders-deserve-better-than-zip/): Zipping folders before sending them is an old habit that costs time and disk space and breaks paths. Why we stopped zipping folders and send them as they are.
- [The Honest Trade-Off of P2P File Transfer | StrongFolder](https://help.strongfolder.com/en/blog/honest-trade-off-of-p2p/): P2P file transfer asks one thing of the sender: stay online until the download ends. Why we chose it anyway, when a cloud link is better, and how to plan.
- [Multilingual File Sharing: StrongFolder in 52 Languages](https://help.strongfolder.com/en/blog/strongfolder-in-52-languages/): The StrongFolder Chrome extension speaks 52 languages. Why multilingual file sharing matters when files cross borders, and why the recipient installs nothing.
- [What Makes StrongFolder Different From Cloud Transfer](https://help.strongfolder.com/en/blog/what-makes-strongfolder-different/): Direct transfer instead of storage, no upload wait, no size cap, folders without zipping, no account: six ways StrongFolder differs from cloud file sharing.
- [What "No File Size Limit" Really Means (Honestly) | StrongFolder](https://help.strongfolder.com/en/blog/what-no-size-limit-really-means/): No file size limit from us does not mean no limits at all. Upload speed, disk space and staying online decide — with a time table for 10 GB to 1 TB and tips.
- [Large File Transfer Use Cases: Who Uses StrongFolder](https://help.strongfolder.com/en/blog/who-uses-strongfolder/): Four large file transfer use cases: a 120 GB wedding film, a Revit project, a 30 GB game build and a family photo archive — before and after going direct.
- [Why I Started StrongFolder](https://help.strongfolder.com/en/blog/why-i-started-strongfolder/): Founder Maksym Ronshyn on the file-sharing problems that led to StrongFolder: middlemen, privacy doubts, slow uploads, accounts and lost control over files.
- [Why We Built a Chrome Extension for StrongFolder](https://help.strongfolder.com/en/blog/why-we-built-a-chrome-extension/): Why StrongFolder lives in your Chrome toolbar: always at hand, one-click sharing, no heavy desktop app, automatic updates — and the same direct, private transfer.
- [Why We Don't Store Your Files (and What We Do Keep)](https://help.strongfolder.com/en/blog/why-we-dont-store-your-files/): File sharing without storage: what StrongFolder keeps (transfer metadata), what it never keeps (your files), how the relay works and the honest limits of P2P.

Full text of every page: https://help.strongfolder.com/llms-full.txt. Each page also has a Markdown version: add .md to its URL without the trailing slash.

Other languages: https://help.strongfolder.com/id/llms.txt, https://help.strongfolder.com/de/llms.txt, https://help.strongfolder.com/es/llms.txt, https://help.strongfolder.com/fr/llms.txt, https://help.strongfolder.com/it/llms.txt, https://help.strongfolder.com/nl/llms.txt, https://help.strongfolder.com/nb/llms.txt, https://help.strongfolder.com/pl/llms.txt, https://help.strongfolder.com/pt/llms.txt, https://help.strongfolder.com/fi/llms.txt, https://help.strongfolder.com/vi/llms.txt, https://help.strongfolder.com/tr/llms.txt, https://help.strongfolder.com/ru/llms.txt, https://help.strongfolder.com/uk/llms.txt, https://help.strongfolder.com/zh/llms.txt, https://help.strongfolder.com/ar/llms.txt, https://help.strongfolder.com/ja/llms.txt, https://help.strongfolder.com/ko/llms.txt