StudioWavePro — Online Audio Editor with 48+ Studio Tools

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Streaming services don’t care how loud your file *can* go — they measure how loud it *feels* using LUFS (Loudness Units relative to Full Scale) and turn everything to a common level. StudioWavePro’s Loudness Meter runs the same ITU-R BS.1770 measurement the platforms use: your audio is K-weighted (filtered to match how human ears perceive loudness) and integrated over the full track to produce one LUFS number, alongside the sample peak in dBFS and the RMS average power.

The verdict table does the interpreting for you: your measured loudness is compared against Spotify and YouTube (−14 LUFS), Apple Music (−16), the podcast standard (−16), and EBU R128 broadcast (−23), each row showing exactly how many dB louder or quieter you are than target — color-coded green when you’re within half a dB. No more uploading, listening, and guessing.

When to use

Check a master against Spotify or YouTube loudness before releasing it.
Verify a podcast episode hits the −16 LUFS spoken-word standard.
Compare the loudness of two mixes by numbers instead of switching and guessing.
Confirm a file isn’t clipping (peak above 0 dBFS) before publishing.
Check audio for a video or ad against broadcast loudness rules (EBU R128).
Measure how much headroom a recording has before mastering decisions.

How to use

Click "Open Loudness Meter" below to launch the editor.
Drop in any audio file — MP3, WAV, OGG, M4A and FLAC are all supported.
The analysis runs automatically over the whole track — no settings needed.
Read the three measurements: integrated LUFS, peak (dBFS), and RMS.
Check the targets table to see how far you are from Spotify, YouTube, Apple Music, podcast, and broadcast levels.

Tips

If you’re quieter than target, the platform turns you up (usually harmless). If you’re louder, it turns you down — meaning you sacrificed dynamics for nothing. Slightly under target is the safe side.
To raise loudness: Compressor first (to reduce peaks), then Normalize, then re-measure here. To lower it: the Volume tool with a negative dB value, by exactly the excess shown in the table.
Peak and LUFS answer different questions: peak is the tallest single sample (clipping risk); LUFS is perceived loudness over time. A track can peak at 0 dBFS and still be quiet in LUFS.
Podcasts: −16 LUFS integrated with peaks under −1 dBFS is the widely used spec — this meter checks both numbers at once.
Measure after every processing step that changes level (EQ boosts, compression, bass boost) — they all move LUFS.

Frequently asked questions

What is LUFS and why does it matter?: LUFS measures perceived loudness — how loud audio feels to a listener, not just how tall its waveform is. Streaming platforms normalize everything to a LUFS target (Spotify and YouTube use −14), so mastering louder than target gets turned right back down. Knowing your LUFS tells you exactly where you stand.
What LUFS should my track be for Spotify or YouTube?: Both normalize to about −14 LUFS integrated. Apple Music uses −16, podcasts conventionally target −16, and broadcast (EBU R128) requires −23. The meter shows your distance from each in one table.
How is the LUFS measurement calculated?: Per ITU-R BS.1770, the standard every major platform follows: the audio is K-weighted (a high-shelf at ~1.5 kHz plus a low-frequency roll-off that mimics ear sensitivity), the energy of all channels is combined, and the result is integrated over the whole file into a single LUFS value.
What is the difference between peak, RMS and LUFS?: Peak is the single loudest sample — above 0 dBFS means digital clipping. RMS is the average power of the signal, a rough energy estimate. LUFS is RMS-like but frequency-weighted to match human hearing, which is why platforms use it for normalization. The meter reports all three.
My track is louder than −14 LUFS. Should I turn it down?: If it’s mastered loud for artistic reasons, you can leave it — Spotify just plays it quieter. But if you’re crushing dynamics with heavy limiting only to be normalized down anyway, you’re paying the cost without the benefit. Use the Volume tool to reduce by the excess dB the table shows, and keep the dynamics.
How do I make my track hit a specific LUFS target?: Too quiet: apply the Compressor (to control peaks), then Normalize, then re-measure. Too loud: apply Volume with a negative adjustment equal to your excess (e.g. measured −11 against a −14 target → −3 dB). One or two iterations gets you within half a dB.

StudioWavePro is a complete audio editor with 48+ studio-grade tools in one workspace. Trim, master, EQ, time-stretch, denoise, remove vocals, detect BPM and musical key, generate metronomes, and more. Editing tools

Audio Trimmer — crop a track to a selected region

Mute Section — silence a selected region

Reverse Audio — play the track backwards

Fade In/Out — ramp volume at start or end

Silence Trimmer — strip leading and trailing silence

Silence Gap Inserter — insert silence at a chosen position

Audio Looper — repeat a section N times

Audio Splitter — cut a track into multiple parts

Audio Merger — join multiple files end-to-end

Silence Splitter — auto-split at silent gaps

Crossfade Joiner — join clips with overlapping fades

Time and pitch

Speed Changer — speed up or slow down (with optional pitch preservation)

Pitch Shift — change pitch without changing tempo

Tempo Detector — estimate the BPM of a music track

Key Detector — estimate the musical key

Metronome Generator — create a click track at any BPM

Effects

Volume — make a track louder or quieter

Bass Boost — lift the low end

Treble Boost — lift the high end

Low Pass Filter — cut off high frequencies

High Pass Filter — cut off low frequencies (remove rumble)

Equalizer (3-band) — low / mid / high tonal shaping

Equalizer (10-band) — fine-grained tonal control

Echo — add repeating echoes / delay

Distortion — overdrive, fuzz, and lo-fi grit

Stereo Balance — shift the L/R center of a stereo mix

Stereo Widener — make stereo narrower or wider

Vocal Remover — karaoke (center-channel removal)

Hum Remover — strip 50/60 Hz mains hum

Mastering and analysis

Normalize — maximize volume without clipping

Compressor — even out loud and quiet parts

Loudness Meter — measure peak, RMS, and LUFS

Mono Converter — collapse stereo to mono

Channel Extractor — pull L, R, Mid, or Side

Sample Rate Converter — resample to 44.1, 48, or 96 kHz

Polarity Inverter — flip waveform for phase alignment

DC Offset Remover — center waveform around zero

Audio Visualizer — render an animated video from audio

StudioWavePro supports MP3, WAV, OGG, M4A, and FLAC files. Exports include WAV and MP3. This app requires JavaScript to run. Please enable JavaScript in your browser.