Mixing and mastering
Check a bounce in the waveform analyzer before it goes to a distributor: integrated LUFS, true peak, clipping in the loudest chorus. Then add title and artist with the MP3 tag editor.
Free Online Waveform Analyzer With Peak, RMS and LUFS
EzVisualizer is a free waveform analyzer that runs in your browser. Open an audio file or your microphone, zoom from the whole song down to single samples, and read peak, true peak, RMS and integrated LUFS, with clipping and silence marked for you. The same audio opens in spectrum, spectrogram and oscilloscope views. Nothing is uploaded.
- Free, no sign-up
- Peak, RMS and LUFS
- File or live microphone
- Nothing uploaded
What a Waveform Analyzer Shows You
A waveform is the level of your audio over time: tall where it is loud, thin where it is quiet, flat where nothing plays. A waveform viewer draws that shape. A waveform analyzer also measures it: the highest sample peak in dBFS, an estimate of the true peak between samples, the RMS level, the integrated loudness in LUFS, any clipped samples and every stretch of silence. You get the picture and the numbers behind it, with the left and right channels drawn separately so you can compare them.
Analyze a FileWhy a Waveform Viewer Alone Is Not Enough
The shape a waveform viewer draws tells you a lot, but it hides the details that matter when you finish a mix, a podcast or a transfer:
- Two masters with the same peak can sit 6 dB apart in loudness. Only a LUFS reading shows which one a streaming service will turn down.
- A peak at 0.0 dBFS can still clip after MP3 or AAC encoding, because the true peak between samples goes higher.
- Clipped samples are a few samples wide. At song zoom they are invisible.
- Silence at the start, the end and between tracks is hard to measure by eye.
- A screenshot gives you no numbers to paste into a mastering note or a report.
Why Use This Audio Waveform Analyzer
A waveform display, a loudness meter and a clipping check in one browser tab, with three more views of the same sound one click away.
Numbers, not only a picture
Peak dBFS, approximate true peak, RMS, integrated LUFS and DC offset sit next to the waveform, ready to copy.
Zoom down to the sample
The waveform viewer goes from a ten minute overview to the individual samples of one kick drum without the view stuttering or losing detail.
Four views, one file
Switch the same audio between waveform, spectrum, spectrogram and oscilloscope views. People who check a waveform usually want the others too.
File or live microphone
Analyze a finished track, or watch your microphone or another browser tab scroll by live, with a running loudness meter.
Your audio stays on your device
Decoding and measuring run inside your browser tab. Unreleased songs and private recordings never reach a server.
Free PNG and CSV export
Save the waveform analysis as a PNG for a client or a CSV for a spreadsheet. No account, no limits on how many files you check.
How to See the Waveform of an Audio File Online
Three steps and about a minute with the waveform analyzer above. It works on a laptop, a desktop or a phone.
Drop an MP3, WAV, FLAC, M4A or OGG file on the tool, press the microphone button for live input, or load the demo to try it first.
Scroll to zoom the waveform display, drag to move, click to jump. Play any part of the track, or loop a section while you watch it.
Check peak, true peak, RMS and LUFS, jump to the first clip, see the silence shaded, then save a PNG or a CSV.
Step 1 · Open your audio
Waveform Analyzer Features
What the waveform viewer draws, what it measures and what it flags for you.
A waveform display that zooms to the sample
The waveform display is built at several resolutions, so a ten minute file opens at once and stays sharp as you zoom in. Left and right are drawn as separate lanes (or mid and side), on a linear or dB scale, with the RMS level as a brighter core inside the peaks. Zoom far enough and the line becomes the actual samples. It doubles as an audio player with waveform seeking: click anywhere to play from there, and the audio player waveform follows the playhead. Each beat waveform shows its attack and decay.
Zoom Into a TrackPeak, RMS and LUFS side by side
Peak shows the single highest sample. RMS shows the average level, closer to how loud it feels. Integrated LUFS, measured the EBU R128 way over the whole file, is the number streaming services use to set playback volume, and the loudness range shows how much it moves. A loudness lane under the waveform plots short-term loudness against a reference line at −14, −16, −23 or −24. Seeing it all together turns the waveform analyzer into a LUFS analyzer for checking a master before it goes out.
Check My LoudnessClipping, true peak and DC offset
Runs of samples at full scale are marked as clipping and counted, and one click jumps to the first. The true peak estimate, 4x oversampled, shows how far the signal goes between samples, which is what an encoder or a cheap DAC sees. A DC offset reading catches a recording that sits off center. Think of it as a waveform scanner for the problems you cannot hear on laptop speakers.
Scan for ClippingSilence detection and markers
The audio waveform analyzer shades every silent stretch on the waveform, measures the silence at the start and the end, and counts the gaps longer than a second. You set the threshold, and one click selects the audio without the silence. Press M while it plays to drop a marker on a cough, a breath or a chorus; the markers go into the CSV with the rest of the waveform analysis.
Find the SilenceA Waveform Analysis of a Loud Master
What the waveform analyzer reports for a typical modern pop master, with the readings explained.
What you are looking at
This master peaks at −0.1 dBFS, but its true peak reaches +0.6 dBTP, so the encoded MP3 may clip: the waveform analyzer marks three short overs in the last chorus. Integrated loudness is −8.4 LUFS, much louder than Spotify’s −14 LUFS reference, so on Spotify it plays about 5.6 dB quieter. The quiet intro and the outro fade show up as silence markers. Want to see which frequencies make it loud? Open the same file in the spectrum analyzer.
Waveform Viewer Specs
What this waveform viewer reads and measures. Specs checked November 2026.
| This siteEzVisualizer waveform analyzer | |
|---|---|
| Input | An audio file, your microphone or another browser tab (live; tab audio in desktop Chrome or Edge), or a demo signal |
| Files | MP3, WAV, FLAC, M4A/AAC, OGG, or anything else your browser can decode; up to 400 MB and 20 minutes (10 on phones) |
| Waveform display | Left and right or mid and side lanes, linear or dB scale, RMS core, zoom to single samples |
| Levels | Sample peak (dBFS), true peak (4x oversampled estimate), RMS, crest factor, DC offset, stereo correlation |
| Loudness | Integrated LUFS, loudness range, momentary and short-term max (ITU-R BS.1770-4 / EBU R128); short-term loudness lane |
| Detection | Clipped runs marked and listed, silence at start and end, gaps over 1 s shaded, your own markers |
| Playback | Play, click to seek, loop a selection, keyboard shortcuts |
| Export | PNG up to 3840 px wide (transparent if you like); stats CSV and loudness curve CSV |
| Other views | Spectrum, spectrogram and oscilloscope of the same audio |
| Privacy and price | Runs in your browser, nothing uploaded; free, no account |
Waveform Analyzer or Desktop Software?
Compared by type of tool. Audacity is a free, open-source editor; audiowaveform is the BBC’s open-source command-line program for waveform images.
| This siteEzVisualizer | Basic online waveform viewer | Desktop audio editor | Command-line tools | |
|---|---|---|---|---|
| Zoomable waveform | Yes | Often a fixed image | Yes | Image only |
| Peak and RMS | Yes | Rarely | Yes, in analysis menus | With extra tools |
| Integrated LUFS | Yes | No | Varies by editor or plugin | With extra tools |
| Clipping and silence | Marked automatically | No | Varies | No |
| Spectrum, spectrogram, scope | All three, one click | Rarely | Some of them | No |
| Live microphone | Yes | No | Record first, then look | No |
| Install | None, runs in the browser | None | Required | Required, plus a terminal |
Who Uses a Waveform Analyzer
From a mastering check to a lesson on how digital audio works, these are the jobs a waveform analyzer does best.
Podcasters
Apple Podcasts asks for about −16 LKFS and a true peak at or below −1 dBFS. Measure an episode (up to 20 minutes per file), spot long pauses, then cut a teaser with the audiogram generator.
Beat makers and DJs
Zoom into a kick to see its attack, line up a loop point on a zero crossing, then get the tempo with the BPM finder.
Voice and field recording
Watch the live waveform display while you set the mic gain, then open the take and look for clipping, hum (in the spectrum) and DC offset.
Teachers and students
Show what a digital audio waveform really is: zoom the waveform viewer from a song to the samples, compare a sine to a square wave, see why loud is not the same as peak.
Archiving and transfers
Run digitized tapes and vinyl sides (up to 20 minutes each) through the audio waveform analyzer: find clipped peaks, measure the silence at each end and mark where tracks change before you split them.
Waveform Analyzer FAQ
Loudness, peaks, files, privacy and the other three views.
How do I see the waveform of an audio file online?
Drop the file on the waveform analyzer at the top of this page. It draws the whole track at once, left and right, and you can zoom, play and loop it. Going from audio to waveform takes a second or two for a song, and nothing is uploaded.
Is this waveform analyzer free?
Yes. Every view, every reading and the PNG and CSV exports are free, with no account and no limit on how many files you open.
What is the difference between peak, RMS and LUFS?
Peak is the single highest sample, in dBFS. RMS is the average energy, closer to how loud a passage feels. LUFS is loudness weighted the way people hear, with a gate that ignores silence, measured over the whole file. Use peak to avoid clipping and LUFS to compare loudness between songs.
What LUFS should my song be for streaming?
Spotify says it adjusts tracks to −14 LUFS by default (−11 on its Loud setting, −19 on Quiet) and asks for a true peak below −1 dB. Apple Podcasts asks for about −16 LKFS. Broadcast under EBU R128 uses −23 LUFS. Figures read on each publisher’s own help page in November 2026; other services set their own, so check theirs.
What is true peak, and why is it higher than the peak?
Sample peak only looks at the stored samples. The real signal between them can swing higher, and an MP3 or AAC encoder or a playback chip sees that swing. The waveform analyzer estimates it by oversampling, so read it as a close estimate rather than a certified meter reading.
Can it find clipping in my audio?
Yes. The waveform analyzer marks every run of samples stuck at full scale, and any sample over it, on the waveform, counts them and jumps you to the first one. The stats CSV lists the time of each. A mix can also sound distorted without hitting full scale, so trust your ears too.
Can I use my microphone?
Yes. Allow microphone access and the waveform viewer scrolls with your input live (1 to 40 seconds on screen), next to a momentary, short-term and integrated loudness meter. Nothing is recorded. A phone or laptop mic is not calibrated, so the levels are relative to full scale, not sound pressure in dB SPL.
Which audio files can I open?
The waveform analyzer opens MP3, WAV, FLAC, M4A/AAC and OGG, plus anything else your browser can decode, up to 400 MB and 20 minutes (10 on a phone). An MP3 waveform looks the same as the WAV it came from, apart from the tiny overs encoding can add, so MP3 to waveform works fine for most checks.
Is my audio uploaded anywhere?
No. The file is decoded and measured inside your browser tab, and closing the tab clears it. That makes the audio waveform analyzer safe for unreleased songs and private recordings.
Can I save the waveform as an image or as data?
Yes: a PNG of the visible range, the whole file or a selection, up to 3840 px wide and transparent if you like, plus a stats CSV (readings, silence, markers, clips) and a loudness curve CSV. For a styled image or video to share on social media, use the sound wave generator instead.
What is a digital audio waveform?
A long list of numbers, called samples, usually 44,100 or 48,000 per second for each channel. Each number is the position of the speaker at that instant. Draw them in a row and you get the digital audio wave, or audio wave form, that every editor shows; ask the tool to draw a waveform zoomed all the way in and you see the dots themselves.
Is this a video waveform monitor?
No. A video waveform monitor shows the brightness of video footage. This tool shows the audio waveform of a sound file. If your browser can decode the audio inside a video file, you can open it here to check the soundtrack.
How is it different from waveform display software?
Desktop waveform display software such as Audacity edits audio as well as showing it, and needs an install. Command-line tools such as audiowaveform make waveform images for websites. This waveform analyzer is for looking and measuring: it opens in a browser tab and adds loudness, clipping and silence checks.
Why does my waveform look like a solid block?
The track is heavily limited: the peaks are pushed against the ceiling for loudness, so there is little left between loud and quiet. Zoom in the waveform viewer to see the detail, and compare the integrated LUFS with the peak. A small gap between peak and RMS confirms it.
How do I see the frequencies instead of the waveform?
Switch views in the tool. The spectrum, waveform and spectrogram views all read the same file: the spectrum analyzer shows bass, mids and treble at one moment, and the online spectrogram shows how they change over time. For stereo shapes, try the oscilloscope online.
More Audio Analysis Tools
After the Waveform Analysis
Tag the file, make a waveform image or turn the track into a video.
- Sound Wave GeneratorSound wave videos and images from any audio file.
- Audiogram GeneratorWaveform clips for podcast episodes and interviews.
- MP3 Tag EditorEdit title, artist, album and cover tags in your browser.
- MP3 to MP4 ConverterYour MP3 and cover art as an MP4 that video sites accept.
- YouTube Visualizer16:9 visualizers for singles, albums and long mixes.
- Album Cover Size GuideCheck your artwork against every platform spec.
Open the Waveform Analyzer
Drop an audio file or turn on your microphone: the waveform analyzer shows the shape, the peaks, the loudness and the problems in one view. Free, private and in your browser. For music videos, try the audio visualizer spectrum styles.