Osu Replay — Viewer ^new^

: A browser-based tool where you can drag and drop replay files to watch them directly in Chrome or Firefox. Tips for Analyzing Your Own Gameplay

A project built on top of osu!lazer components, this viewer allows you to watch imported replays outside of the main game client and can render replays to video files using FFmpeg. 5. McOsu (Best for Practical Training)

Before diving into third-party tools, it's essential to understand what the official game offers. In the osu! client, you can view local replays by pressing the grave key ( /~ ) or Ctrl+R. This viewer allows you to speed up/down, hide the interface with H , or jump to comments using the Discussion button. However, the official viewer often lacks deeper analytical features like detailed hit timings or advanced playback controls. As one community member noted, the replay viewing experience in osu!stable is "very poor," lacking a functioning timeline, real-time PP counter, or detailed analytics. This gap is precisely where the tools discussed below come into play. osu replay viewer

Here are some popular osu replay viewers:

| Byte Range | Type | Description | |------------|------|-------------| | 0-3 | int | Game mode (0=std, 1=taiko, 2=ctb, 3=mania) | | 4-7 | int | Game version (e.g., 20250316) | | 8-11 | int | Beatmap MD5 hash (as string offset) | | 12-15 | int | Player name (string offset) | | 16-19 | int | Replay MD5 hash (as string offset) | | 20-21 | short | Number of 300s / Geki / etc. (mode-dependent) | | ... (varies) | ... | Counts for 100s, 50s, misses, combo, perfect flag | | 22 | byte | Mods bitwise (enum, 32-bit later in newer osu! versions) | | 23-26 | int | Life bar graph (string offset) | | 27-30 | int | Timestamp (Windows ticks) | | 31-34 | int | Replay length in bytes (for compressed data) | | 35+ | byte[] | Compressed replay data (LZ4 or older zlib) | | End | long | Replay ID (online submission) | : A browser-based tool where you can drag

It’s open source and free to use. I’d love some feedback on the UI and performance. Let me know if it breaks on any weird map mods!

: The next-generation client includes an improved replay watcher with a scrub bar and adjustable playback speeds, making it much easier to navigate through a play. 2. Specialized Analysis Tools McOsu (Best for Practical Training) Before diving into

: If you are logged in, you can watch top 1,000 global leaderboard replays directly by clicking the player's name on the beatmap screen. Keyboard Shortcuts to quickly rewatch a replay. Press to hide the replay HUD for a cleaner view. 2. Popular Third-Party Replay Viewers & Analyzers

If you want to watch replays without opening the game, or if you want to convert your .osr files into high-quality video formats for YouTube or TikTok, you will need third-party tools. Replayos (Web-Based Viewer)

No installation required, supports all four game modes (standard, Taiko, Catch, Mania), and allows browsing top plays. Best for: Quick reviews without downloading software. How to Use a Replay Viewer (Step-by-Step) Method 1: Using an Online Tool (o!rdr) Visit the o!rdr website. Upload your .osr file (usually found in osu!/Replays ). Select your desired skin (.osk file) if needed. Configure video settings (resolution, FPS, lighting).