Free Online Audio Equalizer

Equalize any song online free. 10-band EQ, 15 presets (Bass Boost, Vocal, Rock), live preview. Works with MP3, WAV and more. Runs in your browser — no upload, no signup.

Boost Bass and Enhance Vocals

File Studio's 10-band equalizer gives you precise control over your audio's frequency spectrum. Boost low frequencies for richer bass in music tracks, or enhance mid-range frequencies to make vocals clearer and more present. Each frequency band can be adjusted independently, allowing you to sculpt the exact sound profile you want. Real-time preview lets you hear changes before committing to the final export.

Professional Presets: Rock, Pop, Jazz, Classical

Not sure which frequencies to adjust? File Studio includes professionally tuned EQ presets for common genres and use cases. Select Rock for enhanced mids and bass, Pop for balanced clarity, Jazz for warm tones, or Classical for natural acoustic reproduction. These presets serve as excellent starting points that you can further customize to match your specific audio content and listening preferences.

Frequently Asked Questions

What is an online audio equalizer?
An online audio equalizer is a web-based tool that lets you adjust the volume of specific frequency ranges in an audio track without downloading any software.
How do I use an equalizer online?
Upload your audio file, select an EQ preset or adjust individual frequency sliders from 31Hz to 16kHz, preview the sound in real time, and click Download to save the equalized audio.
Is this audio equalizer free?
Yes, File Studio's 10-band audio equalizer is 100% free with no sign-up, no hidden fees, and no file limits.
Does File Studio upload my audio?
No. File Studio uses the Web Audio API to process all audio directly inside your browser. Your files never leave your device.
Can I equalize an MP3 or WAV file?
Yes. Common formats including MP3, WAV, M4A, OGG, FLAC, and WebM are decoded locally in your browser and exported as studio-quality WAV files.
Are my files uploaded to a server?
No. File Studio is built on a strict local-first architecture. Every PDF operation — merging, splitting, compressing, redacting — runs entirely inside your browser using JavaScript. Your files never leave your computer. You can even disconnect your internet after the page loads and the tools will continue working perfectly.
Is File Studio completely free?
Yes, 100% free with no limits. There are no file size caps, no daily limits, no watermarks added to your output, and no account or email required. All tools are free forever.
Does it work on mobile and tablet?
Yes. File Studio is fully responsive and works on Android and iOS browsers. All processing happens locally on your phone's or tablet's hardware.

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