ToolJoltTools

DC Offset Checker

Measure the DC offset of each channel and tell you whether it needs a DC-blocking high-pass before mastering or delivery.

DC offset is a constant shift of the waveform away from zero, usually from a faulty interface, soundcard or plugin. It wastes headroom, causes clicks at edit points, and can stress speakers. Anything above ~0.1% of full scale is worth removing with a DC-blocking high-pass (a few Hz) before you master.
References: AES recommended practice — DC offset removal

🔒 Everything runs in your browser — your audio is never uploaded.

Measure the DC offset of each channel and tell you whether it needs a DC-blocking high-pass before mastering or delivery.

About DC Offset Checker

Measure the DC offset of each channel and tell you whether it needs a DC-blocking high-pass before mastering or delivery. Measure the DC offset of each channel and tell you whether it needs a DC-blocking high-pass before mastering or delivery.

How to use DC Offset Checker

  1. 1Drag a file onto DC Offset Checker, or click to choose one — it is analysed locally and never uploaded.
  2. 2Wait a moment while the tool processes the file entirely in your browser.
  3. 3Read the result, metrics and pass/fail verdict.
  4. 4Copy or export the report for your delivery, QC log or records.

Why use DC Offset Checker?

  • ✓Analyses your file entirely in your browser — it is never uploaded, so even confidential masters stay private.
  • ✓100% free with no sign-up, no watermark and no usage limits.
  • ✓Works on any device — desktop, tablet or phone — and keeps working offline once loaded.

Frequently asked questions

What does DC Offset Checker do?+

Measure the DC offset of each channel and tell you whether it needs a DC-blocking high-pass before mastering or delivery. Measure the DC offset of each channel and tell you whether it needs a DC-blocking high-pass before mastering or delivery.

Is my file uploaded to a server?+

No. DC Offset Checker processes your file entirely in your browser using local JavaScript and the Web platform — your media never leaves your device, so it is safe for unreleased or confidential content.

Is DC Offset Checker free to use?+

Yes — it is completely free with no account, no sign-up and no usage limits. There is no watermark and no paywall.

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