# s3viewer

s3viewer is an External Attack Surface Management product. It runs in the cloud. Pricing is free.

A storage exploration tool that provides unified access to view publicly accessible Amazon S3 buckets, Azure Blob storage, FTP servers, and HTTP directory listings.

Checked October 2026.

## What is s3viewer?

s3viewer is a storage exploration tool designed to view and browse publicly accessible cloud storage resources across multiple platforms.

The tool provides unified access to various storage services including Amazon S3 buckets, Azure Blob storage containers, FTP servers, and HTTP directory listings. It enables users to navigate through publicly exposed storage repositories without requiring authentication credentials.

The application offers a centralized interface for examining the contents of open storage systems, allowing security professionals and researchers to identify misconfigured or unintentionally exposed data repositories. Users can browse directory structures, view file listings, and access publicly available content across different storage platforms.

s3viewer supports multiple storage protocols and cloud providers, making it useful for security assessments, compliance audits, and identifying potential data exposure risks in cloud environments.

Tags: Azure, S3, AWS, Misconfiguration

## Where it fits in your security program (NIST CSF 2.0)

- [Identify](https://cybersectools.com/guides/building-identify-program-small-team): helps you know your assets and your risks.

## Quick facts

- Category: [Exposure & Vulnerability Management](https://cybersectools.com/categories/exposure-vulnerability-management) · [External Attack Surface Management](https://cybersectools.com/categories/external-asm)
- Deployment: Cloud
- Company size fit: SMB, Mid-Market, Enterprise
- Pricing model: Free
- GitHub stars: 448
- Website: github.com

## Where it ranks

s3viewer is not a pick on the current [Best Attack Surface Management Solutions for Business](https://cybersectools.com/shortlists/best-attack-surface-solutions).

## s3viewer FAQ

### What is s3viewer?

s3viewer is a product in the External Attack Surface Management category. It covers Azure, S3 and AWS.

### What is the pricing for s3viewer?

s3viewer is free. Download and setup instructions are at https://github.com/SharonBrizinov/s3viewer/.

### What are alternatives to s3viewer?

Alternatives to s3viewer listed on CybersecTools:

1. [ctlogs.dev](https://cybersectools.com/tools/ctlogsdev) - Fast Certificate Transparency search and JSON API for subdomain reconnaissance. (Commercial)
2. [Intruder Attack Surface Management](https://cybersectools.com/tools/intruder-attack-surface-management) - Attack surface mgmt platform with vuln scanning and cloud security features (Commercial)
3. [Siemba EASM](https://cybersectools.com/tools/siemba-easm) - AI-driven EASM platform for discovering and monitoring external-facing assets (Commercial)
4. [CyberXTron ShadowSpot](https://cybersectools.com/tools/cyberxtron-shadowspot) - External attack surface management platform for asset discovery and risk detection (Commercial)
5. [GoSecure Titan® Attack Surface Management](https://cybersectools.com/tools/gosecure-titanr-attack-surface-management) - Discovers, monitors, and assesses external attack surface assets continuously. (Commercial)

Compare all s3viewer alternatives at [https://cybersectools.com/alternatives/s3viewer](https://cybersectools.com/alternatives/s3viewer)

### What deployment and organization size does s3viewer fit?

s3viewer is available as a cloud service. It is listed for small businesses, mid-market companies and enterprises. It is free.

## Compare s3viewer with similar solutions

- [s3viewer vs ctlogs.dev](https://cybersectools.com/compare/ctlogsdev-vs-s3viewer)
- [s3viewer vs Intruder Attack Surface Management](https://cybersectools.com/compare/intruder-attack-surface-management-vs-s3viewer)
- [s3viewer vs Siemba EASM](https://cybersectools.com/compare/s3viewer-vs-siemba-easm)

All alternatives to s3viewer: [/alternatives/s3viewer](https://cybersectools.com/alternatives/s3viewer)

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Source: https://cybersectools.com/tools/s3viewer

For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any compare page has a Markdown copy too (add .md to its URL).

More on s3viewer: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=product-md