Mapset Verifier
The #1 osu! modding tool. Catch issues before they become problems.
Mapset
Verifier
The #1 osu! modding tool. Catch issues before they become problems.
A total of 98 unique beatmap checks
Incorrect marker spacing.
Unrankable snapping
Contains hyperdashes.
Missing custom hitnormal
Edge dashes.
Too short sliders.
Unused files.
Storyboarded hit sounds.
Overlay layer usage.
Obscured reverse arrows.
More than 20% unused audio at the end.
Too short drain time.
Chord too big for its difficulty.
Too short spinner.
Pattern Lengths
Wrongly or inconsistently snapped hit objects.
Invalid timing line volume.
Abnormal Slider Velocity changes on lower difficulties found.
Perfect stacks too close in time.
Audio channels in video.
Abnormally large spacing.
Breaks only achievable through .osu editing.
Inconsistent mapset id, countdown, epilepsy warning, etc.
Barline is unaffected by a line very close to it.
Incorrect marker spacing.
Unrankable snapping
Contains hyperdashes.
Missing custom hitnormal
Edge dashes.
Too short sliders.
Unused files.
Storyboarded hit sounds.
Overlay layer usage.
Obscured reverse arrows.
More than 20% unused audio at the end.
Too short drain time.
Chord too big for its difficulty.
Too short spinner.
Pattern Lengths
Wrongly or inconsistently snapped hit objects.
Invalid timing line volume.
Abnormal Slider Velocity changes on lower difficulties found.
Perfect stacks too close in time.
Audio channels in video.
Abnormally large spacing.
Breaks only achievable through .osu editing.
Inconsistent mapset id, countdown, epilepsy warning, etc.
Barline is unaffected by a line very close to it.
Barline is unaffected by a line very close to it.
Inconsistent mapset id, countdown, epilepsy warning, etc.
Breaks only achievable through .osu editing.
Abnormally large spacing.
Audio channels in video.
Perfect stacks too close in time.
Abnormal Slider Velocity changes on lower difficulties found.
Invalid timing line volume.
Wrongly or inconsistently snapped hit objects.
Pattern Lengths
Too short spinner.
Chord too big for its difficulty.
Too short drain time.
More than 20% unused audio at the end.
Obscured reverse arrows.
Overlay layer usage.
Storyboarded hit sounds.
Unused files.
Too short sliders.
Edge dashes.
Missing custom hitnormal
Contains hyperdashes.
Unrankable snapping
Incorrect marker spacing.
Barline is unaffected by a line very close to it.
Inconsistent mapset id, countdown, epilepsy warning, etc.
Breaks only achievable through .osu editing.
Abnormally large spacing.
Audio channels in video.
Perfect stacks too close in time.
Abnormal Slider Velocity changes on lower difficulties found.
Invalid timing line volume.
Wrongly or inconsistently snapped hit objects.
Pattern Lengths
Too short spinner.
Chord too big for its difficulty.
Too short drain time.
More than 20% unused audio at the end.
Obscured reverse arrows.
Overlay layer usage.
Storyboarded hit sounds.
Unused files.
Too short sliders.
Edge dashes.
Missing custom hitnormal
Contains hyperdashes.
Unrankable snapping
Incorrect marker spacing.
Automatic Snapshots
Automatically track mapset changes over time. Browse snapshot history and see exactly what was added, removed, or modified — per difficulty or for the whole set.
Automatic Snapshots
Automatically track mapset changes over time. Browse snapshot history and see exactly what was added, removed, or modified — per difficulty or for the whole set.
Up to Date with Ranking Criteria
Every check is updated to match current Ranking Criteria, from metadata and timing to mode-specific rules. Built-in documentation explains each issue, and star rating calculations match osu! lazer.
Up to Date with Ranking Criteria
Every check is updated to match current Ranking Criteria, from metadata and timing to mode-specific rules. Built-in documentation explains each issue, and star rating calculations match osu! lazer.
Complete Overview
One place to understand your entire mapset — metadata, objects, settings, difficulty curves, and audio quality.
Complete Overview
One place to understand your entire mapset — metadata, objects, settings, difficulty curves, and audio quality.
Objects Overview
See every snap divisor and unsnapped object across all difficulties, plus an interactive timeline to compare patterns side by side.
Objects Overview
See every snap divisor and unsnapped object across all difficulties, plus an interactive timeline to compare patterns side by side.
Difficulty Overview
Interactive charts for star rating, slider velocity, and skill strain — all modes, with drag-to-zoom.
Difficulty Overview
Interactive charts for star rating, slider velocity, and skill strain — all modes, with drag-to-zoom.
Audio Overview
Inspect audio format, ranking compliance, and a visual spectrogram — all without leaving Mapset Verifier.
Audio Overview
Inspect audio format, ranking compliance, and a visual spectrogram — all without leaving Mapset Verifier.
Why Mapset Verifier?
Here's how it fares against other modding tools.
Ready to try Mapset Verifier?
Grab the latest release for your platform, or browse beta builds and release notes on the downloads page.
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