px0 is an IDE built for reviewing AI-generated code, optimized for speed. It boots in under 1 millisecond and uses approximately 20 MB of RAM, turning your browser into a zero-latency console with native Git and GitHub integrations, instant search across massive codebases, and seamless handoff to local AI coding harnesses.

Can px0 be used to inspect code on remote servers and cloud VMs?

Yes. px0 is remote-first. You can run `px0 -host 0.0.0.0` on any remote server, VM, CI runner, or container and browse the codebase directly from your local web browser over HTTP or TLS, without configuring SSH keys, setting up port-forwarding tunnels, or running heavy server daemons.

Why use px0 instead of a heavy editor like VS Code?

Code increasingly arrives from the terminal via AI coding agents, compilers, or remote test runners. Developers spend most of their time in verification, audit, and navigation. Full desktop IDEs take seconds to boot and consume 1.4+ GB of RAM just to inspect files. px0 starts in under 1 ms with ~20 MB RAM, providing zero-latency code reading and delegated agent editing without editor bloat.

Does px0 require language servers to work?

No. Language servers are completely optional. px0 automatically detects servers like gopls, rust-analyzer, or clangd on your PATH if present, but falls back instantly to a built-in regex-based outline and fuzzy search if no server is installed.

How does px0 handle large repositories?

px0 uses windowed syntax highlighting and virtual DOM rendering (only rendering visible rows on screen), so opening a 400,000-line file costs the same as a 10-line file. It fuzzy-finds across the Linux kernel (95,710 files) in 6 ms.

How do I install px0?

Run `curl -fsSL https://px0.ai/install.sh | sh` on macOS, Linux, or BSD. Prebuilt binaries for 15 OS and architecture targets are also available on GitHub Releases.

How do I avoid sudo prompts when installing or updating px0?

If px0 was previously installed with sudo, remove the active root-owned binary and reinstall cleanly to user space (~/.local/bin) by running: `sudo rm -f "$(which px0)" && curl -fsSL https://px0.ai/install.sh | sh`. All future updates will then run in user space with zero sudo requirements.

Does px0 send code or project data to the cloud?

No. px0 runs strictly locally and never transmits your code, file paths, symbol names, or search queries.

CLI Flags & Parameters

This reference covers the complete list of startup arguments and command options supported by the px0 executable.

Command Syntax

px0 [flags] [file, directory, or pull request URL]

If the argument is omitted, px0 opens the current working directory (.). You can pass a folder to browse an entire codebase, a single file to jump directly into it, or a GitHub pull request URL to enter review mode.

Complete Flags Reference

Flag	Type	Default	Description
`-port <int>`	integer	`7777`	Port to listen on. Passing `0` automatically picks a random free port.
`-host <string>`	string	`127.0.0.1`	Network interface address to bind. Use `0.0.0.0` to expose px0 over local networks, Docker containers, or remote cloud VMs.
`-base-path <path>`	string	`"/"`	Base URL path prefix to serve endpoints and assets from (e.g. `/rev-123/`). Also configurable in settings via `server.basePath`.
`-y, -yes`	boolean	`false`	Legacy bypass flag (merged PRs now open automatically without confirmation).
`-no-open`	boolean	`false`	Do not launch the default web browser automatically on startup. Useful for background execution or remote sessions.
`-no-lsp`	boolean	`false`	Do not use language servers (such as `gopls`, `rust-analyzer`, or `clangd`), even if installed on `$PATH`. Falls back to the built-in regex outline and search.
`-no-git`	boolean	`false`	Disable git repository awareness, branch detection, status badges, and diff overlays.
`-agent <harness>`	string	`none`	Pin coding harness for in-app agent edits: `claude`, `gemini`, `cursor-agent`, `agy`, `opencode`, `codex`, `aider`, `goose`, or a custom command template containing `{prompt}`.
`-no-agent`	boolean	`false`	Disable coding harness discovery and edit capabilities entirely.
`-no-color`	boolean	`false`	Disable ANSI color codes in terminal startup output.
`-quiet`	boolean	`false`	Suppress informational startup narration in the terminal.
`-verbose`	boolean	`false`	Enable verbose logging including request timing, prompt payloads, and agent job IDs.
`-update`	boolean	`false`	Check for, download, and install the latest available release of px0 directly into user space.
`-no-update`	boolean	`false`	Do not auto-update px0 on startup.
`-v, -version`	boolean	`false`	Print px0 version and exit.

Examples

Reviewing a GitHub Pull Request Directly

# Open a GitHub pull request with merge-base diffs and live commenting
px0 https://github.com/owner/repo/pull/123

Reverse Proxy & Subpath Hosting

# Host behind a reverse proxy or PR review pod with a custom URL path prefix
px0 -base-path /rev-123/ -host 0.0.0.0 -port 7777 /path/to/project

Ephemeral Port and Headless Mode (Remote / Agent Workflow)

px0 -port 0 -no-open /path/to/project

Pinning an Agent Harness for the Session

# Pin Claude Code
px0 -agent claude /path/to/project

# Or pin Gemini CLI
px0 -agent gemini /path/to/project

# Or use a custom command template
px0 -agent 'my-agent --prompt {prompt}' /path/to/project

Disabling Agent Dispatch

px0 -no-agent /path/to/project

Exposing Across Local Network or Cloud VM

px0 -host 0.0.0.0 -port 7777 -no-open /path/to/project

Self-Update to Latest Release

px0 -update