Helphonic

Audio Cutter & Joiner

Trim and join audio files in your browser. Arrange clips, adjust volume, add fades and download a WAV without uploading audio.

Unlimited Free Usage

Choose WAV, MP3, Ogg, FLAC or M4A files supported by your browser. Preview each clip, set start and end times in seconds, then arrange the joining order.

    Export is a 44.1 kHz, 16-bit PCM WAV. Mono clips are duplicated into stereo when joined with stereo clips. Fades apply to the beginning and end of the joined output. Amplifying loud audio can clip. Total source duration is limited to 180 seconds, even when trimming a shorter part.

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    File contents and entered text stay on this device. Only access checks and non-content usage metadata go to Helphonic.

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    Current limits

    per operation

    Files
    6
    Per file
    10 MB
    Total size
    20 MB
    Source audio
    Up to 6 files and 180 seconds of combined source audio
    Channels
    mono or stereo
    Decoded audio / export
    64 MB decoded audio. Export: 44.1 kHz PCM16 WAV.

    Limits protect your device memory. Processing speed depends on your device.

    Read the security details
    Limit comparison

    How to increase limits

    Compare the per-operation limits available after registration or with an active paid pass.

    Free account

    Registered user

    Unlimited Free Usage

    Files
    6
    Per file
    10 MB
    Total size
    20 MB
    Source audio
    Up to 6 files and 180 seconds of combined source audio
    Channels
    mono or stereo
    Decoded audio / export
    64 MB decoded audio. Export: 44.1 kHz PCM16 WAV.
    Create a free account
    All access passes

    Unlimited operations during active validity, subject to abuse safeguards.

    Files
    6
    Per file
    10 MB
    Total size
    20 MB
    Source audio
    Up to 6 files and 180 seconds of combined source audio
    Channels
    mono or stereo
    Decoded audio / export
    64 MB decoded audio. Export: 44.1 kHz PCM16 WAV.
    View packages

    The same limits may apply to every tier. Check before purchasing. Device safety limits still apply.

    Frequently asked questions

    Is my media uploaded?

    No. Processing and previews stay in your browser. Helphonic serves this page and its scripts and checks access settings using non-content usage metadata. Your media, file names and recording contents are not sent to the server or analytics.

    Is this tool free?

    This tool launches with unlimited free usage for guests, registered users and active paid users. Administrators can change access allowances later. Current access information appears on the tool page; device safety limits still apply.

    Will it work on every device?

    A current browser and enough device memory are required. Smaller files work better on phones. Browser audio codec support varies; GIF encoding requires module workers.

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    How to use

    Audio Cutter & Joiner

    Learn how to use Audio Cutter & Joiner: step-by-step instructions, settings, export options, privacy, limits and troubleshooting.

    Step-by-step instructions

    1. Choose one or more WAV, MP3, Ogg, FLAC or M4A files supported by your browser.
    2. Preview the clips with their audio players and enter start and end times in seconds.
    3. Move clips up or down to set the joining order; remove unwanted clips.
    4. Adjust volume and optional fade-in and fade-out durations.
    5. Click Export edited WAV and download the joined result.
    Supported audio and output

    Audio must decode in the current browser, contain one or two channels and have a known duration. Browser codec support varies. WAV headers are checked before decoding. M4A, Ogg and other containers may hold unsupported codecs.

    Output is always a 44.1 kHz, 16-bit PCM WAV; MP3 encoding is not included. Mono clips are duplicated across both channels when joined with stereo clips. Resampling and PCM conversion mean this is not a lossless container-only edit.

    Trimming, volume and fades

    Start and end times apply separately to each clip. Fades affect the beginning and end of the entire joined output, not every clip. Joining is sequential, without crossfades or overlapping tracks.

    Volume ranges from 0 to 200 percent. Higher volume can clip loud samples. Lower the volume if the result sounds distorted. Source players preview the original audio; review the downloaded WAV for the final trims, gain and fades.

    Device safety and privacy

    Combined source duration is limited to 180 seconds, even when selecting short excerpts from longer files. Decoded audio is limited to 64 MB; current per-file and combined compressed-file limits also apply. Up to six clips may be joined.

    Audio remains on your device. Native browser decoding cannot always be interrupted immediately; Cancel prevents an export once decoding returns. No edits are saved after leaving the page.

    Processing and privacy

    Files and entered content are processed on your device in this browser tab. File contents and results are not uploaded to Helphonic or sent to analytics. The page still contacts Helphonic to load its tools, check access and confirm non-content usage information. Work is not saved to your account; download or copy results before leaving or reloading the page.

    If an operation cannot finish

    Use a current browser and smaller inputs if the tab runs out of memory. Some tools download a local processing library or model on first use, so an internet connection is needed even though your content stays on the device.

    If the tool reports that access or limits changed, review the current policy and run it again. If usage confirmation is uncertain after an interrupted connection, a retry can count as another operation. Download completed work before reloading; this site does not keep a recovery copy.

    About this tool

    Choose supported audio files, preview them and set start and end times for each clip. Reorder clips, adjust volume and add fades at the beginning and end of the joined output. Export a 44.1 kHz, 16-bit PCM WAV. Input codec support depends on your browser.

    Read the full Audio Cutter & Joiner guide (opens in a new tab)