Do I or the recipient need an account or registration?

No. FileGuard operates on strict privacy-first principles. There are no user accounts, passwords, or email sign-ups required. Your activity history is maintained privately on your own device using client-side localStorage.

Can I upload and share an entire folder without compressing it first?

Yes. You can drag and drop entire folders or multiple files into FileGuard. The server automatically bundles them into an organized ZIP archive in memory while preserving relative directory hierarchy.

How does FileGuard protect against file tampering?

FileGuard implements an authoritative pre-flight SHA-256 cryptographic check before serving any file. If an object is modified by even 1 bit in storage, the download stream is immediately terminated with an HTTP 409 Anti-Tamper Protected alert and flagged in the security audit log.

What is the file size limit and upload quota?

Single files or folder bundles up to 100 MB can be uploaded. To ensure fair infrastructure usage and prevent abuse, each client IP has a rolling 100 MB quota per 12 hours.

Can I delete or revoke my file before the 12-hour expiration?

Yes. From your 'My History' dashboard, you can click 'Revoke & Purge' on any active file to immediately erase it from Backblaze B2 cloud storage and invalidate the share link ahead of time.

End-to-End Encrypted • Strict 12-Hour Expiration • Zero Accounts

Free End-to-End Encrypted File Sharing With 12-Hour Self-Destruct

Share files and complete folder hierarchies anonymously with end-to-end encryption in transit and AES-256-GCM at rest, cryptographically random tokens, instant QR codes, real-time SHA-256 pre-flight integrity verification, and automatic cloud purge.

Share a File Now How It Works Compare Features

Click to select files, or drag & drop files / folders

Any file type supported (PDF, images, videos, docs, code, ZIP) • Max 100 MB Limit

TRANSFER SETTINGS (OPTIONAL) Configure

Simple, Controlled Temporary Sharing

How FileGuard protects files during transit, rest, and destruction

Upload & Hash

Your file is saved in isolated server-side storage with an unpredictable internal UUID. An authoritative SHA-256 reference hash is calculated immediately.

Share Link & QR

Receive an 8-digit CSPRNG tokenized URL and instant QR code. The token itself is hashed with SHA-256 at rest to guard against database leak disclosure.

Verify & Destroy

Recipients download the file only after real-time SHA-256 integrity verification. After exactly 12 hours, the file is automatically purged from disk and cloud storage.

END-TO-END CRYPTOGRAPHIC PIPELINE

How End-to-End Encryption Protects Your Data

From client memory to cloud storage, every transfer traverses a zero-exposure pipeline ensuring total confidentiality, authenticated integrity, and unrecoverable 12-hour self-destruction.

STAGE 01 CLIENT MEMORY

Browser Ingestion & Pre-Flight Hash

Files and folder trees are read directly in browser memory without unencrypted temporary staging. An authoritative 256-bit SHA-256 reference hash is calculated chunk-by-chunk before committing bytes to transit.

SHA-256 Digest Zero Disk Staging

STAGE 02 IN-FLIGHT TRANSIT

TLS 1.3 Transport Tunnel

Data streams traverse high-grade TLS 1.3 encrypted tunnels with Perfect Forward Secrecy (PFS). Packet sniffers, hostile public Wi-Fi networks, and internet service providers receive only scrambled ciphertext.

TLS 1.3 Tunnel Anti-Eavesdropping

STAGE 03 AT-REST CLOUD

AES-256-GCM Storage Vault

Objects committed to Backblaze B2 S3 storage are transparently encrypted with AES-256-GCM authenticated envelopes. Raw share tokens are returned strictly to the uploader; only irreversible digests reside in the database.

AES-256-GCM Hashed Token Digests

STAGE 04 DELIVERY & PURGE

Anti-Tamper Gate & 12h Purge

When the recipient requests download, bytes are re-hashed in real time before transmission. Any single-bit corruption triggers an instant HTTP 409 Anti-Tamper block. At 12 hours, files are permanently erased.

HTTP 409 Anti-Tamper 12-Hour Self-Destruct

FACTUAL COMPARISON

Why Use FileGuard for Quick Transfers (Under 100 MB)?

Big cloud drives and heavy transfer portals are great for gigabyte-scale backups, but they add sign-in friction, email verification loops, and permanent clutter for quick, everyday file drops.

Swipe sideways to compare all platforms

FEATURE / WORKFLOW	FILEGUARD	GOOGLE DRIVE	WETRANSFER	SEND ANYWHERE
Account Requirement	None (Instant 1-Click Drop)	Sign-in with Google Account	Email + 6-Digit Code Loop	No Account Required
Sender Anonymity	100% Anonymous (Zero Metadata)	Exposes Profile Name & Email	Exposes Sender Email Address	Anonymous for Key Transfers
Storage Retention	Auto-Purged in 12h (0 Clutter)	Never Expires (Eats 15 GB Quota)	3-Day Temporary Hold	10-Minute Key Expiry
PIN / Password Lock	Free & Built-In	Google Account ACL Only	Paid Pro Only ($12+/month)	Paid Plan Only
Ad Experience	100% Ad-Free & Zero Tracking	Account Activity Tracking	Full-Screen Ads & Marketing Cookies	Banner & Video Ads

FREQUENTLY ASKED QUESTIONS

Everything You Need To Know About FileGuard

Answers to common questions regarding security, retention policies, and file sizes.

How long are shared files stored on FileGuard?

Every uploaded file or folder bundle remains active for exactly 12 hours from the upload timestamp. Once 12 hours elapse, FileGuard's automated sweeper purges the file from Backblaze B2 cloud storage and marks the record expired.

Do I or the recipient need to create an account?

No. FileGuard requires zero accounts, email addresses, or passwords. Uploaders and recipients enjoy total anonymity. You can track your activity directly in the client-side 'My History' vault on your browser.

Can I upload an entire folder without compressing it first?

Yes! You can drag and drop an entire folder hierarchy or select multiple files. FileGuard streams them into an in-memory ZIP bundle with full directory structure preservation, saving you the hassle of manually creating a ZIP archive.

How does the pre-flight SHA-256 anti-tamper check work?

When an upload is received, FileGuard computes its immutable SHA-256 hash. On every download request, the server re-computes the hash of the storage block before sending it to the client. If any bit has changed due to tampering or storage degradation, the transfer is blocked with HTTP 409 Anti-Tamper Protected.

What is the maximum file size limit and upload quota?

You can upload single files or folder bundles up to 100 MB per transfer. Each client IP has a rolling quota of 100 MB per 12 hours, ensuring the platform remains free, fast, and protected against automated spam and resource exhaustion.

Can I revoke or delete my file before 12 hours?

Yes. Visit the 'My History' page from the browser used to upload the file, and click 'Revoke & Purge'. This immediately purges the file from cloud storage and invalidates the link for all recipients.

Engineered for Information & Network Security

Defensive design principles implemented across all layers of the stack

End-to-End & At-Rest Encryption

Data streams are secured end-to-end with TLS 1.3 cryptographic transport and transparent AES-256-GCM encryption at rest on Backblaze B2 S3 storage.

SHA-256 Integrity Verification

Files are re-hashed on download and against administrative audit requests. If any byte is altered in storage, downloads are immediately blocked.

Strict 12-Hour Expiration

Enforced authoritatively by server clocks. Expired links are rejected instantly, and background workers securely unlink and erase storage copies.

Cryptographic Share Tokens

Generated via Python's secrets CSPRNG. Stored hashed at rest using SHA-256 so compromise of metadata never reveals active download links.

Multi-Layer Threat Defense

Automated VirusTotal threat intelligence scanning, brute-force throttling, and cryptographic integrity verification guard every transfer.

In-Memory Bundling & Quotas

Multiple files and whole folders are packaged into streaming ZIPs in memory with zero disk staging, protected by a rolling 100 MB client-IP quota to stop abuse.

Security & Encryption Transparency Notice

FileGuard implements cryptographic integrity verification via SHA-256 to ensure delivered bytes match the exact upload snapshot (detecting bit-rot and tampering). Stored objects are protected with AES-256-GCM encryption at rest in Backblaze B2 cloud storage and automatically purged after 12 hours.