Osu Replay Viewer !!hot!!

The osu! replay viewer landscape has evolved from simple in-game playback to sophisticated third-party tools that offer pixel-perfect analysis. While the standard client allows you to save and watch scores, external programs like Rewind and Circleguard have become essential for players serious about improvement. Top Replay Viewers & Analyzers

Frame-by-Frame Inspection: View the raw data (time, X/Y coordinates, keys pressed) in a table format for every single frame. osu replay viewer

Focus on specific sections: Identify challenging sections of the beatmap and focus on analyzing those areas.
Compare with others: Compare your gameplay with that of top players to gain insights into new techniques.
Use statistics and metrics: Use detailed statistics to identify patterns of error and track your progress over time.
Practice consistently: Regularly analyze your gameplay and make adjustments to see consistent improvement.

Minimal technical notes

Parse .osr using existing replay parsing libraries (or implement parser for replay frames, input, mods, and seed)
Render beatmap objects using vector drawing at original resolution with scaling; apply approach circle timing via hitobject timing points
Compute timing offsets by comparing replay hit timestamps to beatmap hitobject times (account for mods like Double Time/Half Time)
Estimate PP roughly using existing pp algorithms or display relative performance metrics only

Mastering Your Gameplay: The Ultimate Guide to osu! Replay Viewers The osu

Replay Snipping: Trim the .osr file to only include a specific "god module" or a fail point, then save that segment as a new, smaller replay file. Focus on specific sections : Identify challenging sections

Hit error margin (exactly how many milliseconds you were off).
Internal frame timings (keyboard input latency).
Cursor heatmaps (where you clicked most often).
Sliderbreak points (the specific pixel where you lost the slider tail).

const uploadZone = document.getElementById('fileUploadZone'); const fileInput = document.getElementById('replayFileInput'); uploadZone.addEventListener('click', () => fileInput.click()); fileInput.addEventListener('change', (e) => const file = e.target.files[0]; if (!file) return; const reader = new FileReader(); reader.onload = (ev) => processUploadedJSON(ev.target.result); fileInput.value = ''; ; reader.readAsText(file); ); // drag drop uploadZone.addEventListener('dragover', (e) => e.preventDefault(); uploadZone.style.background = '#1f2e4a'; ); uploadZone.addEventListener('dragleave', () => uploadZone.style.background = ''; ); uploadZone.addEventListener('drop', (e) => e.preventDefault(); uploadZone.style.background = ''; const file = e.dataTransfer.files[0]; if(file && file.type === 'application/json') const reader = new FileReader(); reader.onload = (ev) => processUploadedJSON(ev.target.result); reader.readAsText(file); else alert('drop JSON file plz'); );