SPIRAL by GLENDER

Spec sheet

Purpose

SPIRAL is a browser-based audio mastering workspace for analyzing, shaping, comparing, and exporting tracks locally.Read 9 Oct 2026 · spiral.glenderdj.com

Intended users

The maker presents SPIRAL as a free mastering tool for producers who want to make informed decisions before release.Read 9 Oct 2026 · spiral.glenderdj.com

Privacy

The privacy policy says SPIRAL does not collect, store, or transmit personal data, audio files, or usage information, and audio processing occurs locally in browser memory.Read 9 Oct 2026 · spiral.glenderdj.com

Support

The privacy page lists [email protected] for privacy-related questions.Read 9 Oct 2026 · spiral.glenderdj.com

Analysis

It reports LUFS loudness, true peak and clipping, dynamics, spectrum, stereo correlation, and phase.Read 9 Oct 2026 · spiral.glenderdj.com

Assistant and presets

The site describes a built-in assistant that gives reference-aware guidance and presets for transparent, punchy, or vintage starting points.Read 9 Oct 2026 · spiral.glenderdj.com

Comparison

Users can level-match an A/B comparison with the original, loop sections, and analyze a reference track's LUFS, spectrum, and dynamics.Read 9 Oct 2026 · spiral.glenderdj.com

Cookies and tracking

The privacy policy says SPIRAL uses no cookies, analytics trackers, user identification, login, or profiling.Read 9 Oct 2026 · spiral.glenderdj.com

Donations

The maker says the tool is funded by voluntary donations, with donations processed through Stripe; SPIRAL says it does not store payment card details.Read 9 Oct 2026 · spiral.glenderdj.com

External service

The privacy policy states that the site loads fonts from Google Fonts and that Google may collect anonymized usage data.Read 9 Oct 2026 · spiral.glenderdj.com

Formats

It accepts MP3, WAV, FLAC, AAC, OGG, and M4A, and exports mastered WAV at 16-bit, 24-bit, or 32-bit float precision.Read 9 Oct 2026 · spiral.glenderdj.com

Installation

No installation is required; SPIRAL is a website that needs a modern browser with Web Audio support.Read 9 Oct 2026 · spiral.glenderdj.com

Mastering chain

The adjustable chain includes high-pass filtering, corrective EQ, saturation, compression, tonal EQ, mid-side control, and brickwall limiting.Read 9 Oct 2026 · spiral.glenderdj.com

Plans and prices

Every SPIRAL by GLENDER plan and price →

Where Specifiction places it

• AI mastering tools#42 of 507.1