Hammer: HTTP Stream Inspector
Capture Web Traffic
About
Inspect and analyze network traffic on your iPhone and iPad. This toolkit helps developers and QA engineers debug APIs, mobile apps, and backend services by capturing and reviewing HTTP/HTTPS requests and responses locally.
What's New in Hammer
1.1
September 17, 2026
1 - New Breakpoint Rules let you pause matching requests or responses before forwarding, then choose to continue or drop them. 2 - New Script Rules let you transform matching requests and responses with custom JavaScript. 3 - Improved rule management with search, enable/disable controls, editing, deletion, and clearer rule summaries. 4 - General stability and usability improvements.
MoreFAQ
What is Hammer?
Hammer is a professional toolkit for inspecting and analyzing HTTP and HTTPS network traffic directly on your iPhone and iPad. It helps developers and QA engineers understand communication between apps and backend services.
How does Hammer capture traffic?
Hammer utilizes Apple's Network Extension framework and a Packet Tunnel Provider to create a local proxy on your device. This routes traffic through Hammer for inspection without connecting to a remote VPN server.
Does Hammer have ads?
Yes, Hammer contains advertisements. As a free application, it is supported by ads to provide its network inspection features.
Is my captured data private with Hammer?
Yes, Hammer is designed with local-first privacy. Captured network content is processed and stored on your device by default, and it does not require an account or upload traffic to remote servers.
Can I inspect HTTPS traffic with Hammer?
Yes, Hammer supports HTTPS debugging. You can use optional certificate-based inspection in authorized environments, with certificate installation and trust managed by the user through iOS Settings.
What formats can I export traffic in?
You can export captured sessions as HAR (HTTP Archive) files. This format is useful for desktop analysis, bug reporting, team collaboration, and long-term debugging records.
What devices does Hammer support?
Hammer is supported on iPhone and iPad devices. It requires iOS and is rated for ages 4 and up.
How often is Hammer updated?
The latest version of Hammer is 1.1, which was last updated on September 17, 2026. Updates typically include bug fixes and feature enhancements for the developer tools.
