SoundToStory
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PRIVATE MEDIA CONVERSION

Your files.
Your device.
Your workflow.

Convert audio, video and images in your browser. No media uploads, no remote conversion queue and no watermark on the result.

Start converting →See how it works
LOCAL Browser processingPRIVATE No media uploadsUSEFUL Preview and compare
S SoundToStory● PROCESSED LOCALLY
AUDIOVIDEOIMAGE
WAV
field-recording.wav03:42 · 58.4 MB
→
field-recording.mp3192 kbps · ~5.1 MB
MP3 · 192 kbpsConvert locally →
MP3WAVFLACMP4WEBMJPGPNGWEBP
01 / TOOLS

One private workspace.
Three kinds of media.

Start with a sensible preset, then adjust the details when the destination calls for it.

01

AUDIO

Change MP3, WAV, FLAC, AAC, M4A, OGG and OPUS files directly in your browser. Trim clips, choose quality and normalize loudness while the source stays on your device.

MP3WAVFLACAACM4A
Explore the audio converter →
02

VIDEO

Convert MP4, WebM, MOV and MKV, make GIFs, or extract the first audio track to MP3, M4A or WAV without sending the source to a remote conversion server.

MP4WEBMMOVMKVGIF
Explore the video converter →
03

IMAGE

Change JPG, PNG and WebP files, resize a batch and remove source metadata through re-encoding. Images remain on your device throughout the conversion.

JPGPNGWEBP
Explore the image converter →
YOUR FILE
BROWSER
FFMPEG
NEW FORMAT
NEVER LEAVES
THIS DEVICE
02 / HOW IT WORKS

Private by architecture,
not just by promise.

Traditional converters upload media to a server, process it there and send a result back. SoundToStory loads the conversion engine into your browser and keeps the working files in local memory.

  1. 01
    You choose a fileThe browser creates a temporary local reference.
  2. 02
    Your device converts itWebAssembly and browser APIs do the work locally.
  3. 03
    You download the resultThe temporary output is released when you leave.
Read the complete privacy policy →
03 / WORKFLOW

Useful controls.
Visible results.

A converter should make the trade-off understandable before and after you press the button.

PRESETS

Start with intent

Choose compact voice, balanced music, lossless archive, social image or another practical starting point.

COMPARE

See what changed

Review source and output formats, estimated or exact file size, and local before-and-after previews.

CONTROL

Refine when needed

Trim audio, normalize loudness, extract a soundtrack, resize images and remove source metadata.

04 / FIELD NOTES

Make a better
format decision.

Short, practical guides for choosing outputs and understanding what conversion changes.

Browse all guides →
01
6 min read

MP3 vs WAV: which audio format should you choose?

↗02
5 min read

How to extract audio from a video privately

↗03
5 min read

WebP vs PNG: quality, transparency and file size

↗
05 / FAQ

A few things worth
knowing first.

Do my files upload to SoundToStory?+

No. Audio, video and image conversion runs in your browser. The selected media, filenames and converted results are not sent to SoundToStory.

Which formats are supported?+

Audio supports MP3, WAV, FLAC, AAC, M4A, OGG and OPUS. Video supports MP4, WebM, MOV, MKV and GIF, plus audio extraction. Images support JPG, PNG and WebP.

Why do I need an account?+

An account lets SoundToStory enforce fair free limits, keep plan status and protect paid access. Your media still stays on the device.

Will conversion quality change?+

It depends on the source and output. Lossy formats trade some information for smaller files. SoundToStory shows relevant controls and lets you preview the result.

READY WHEN YOU ARE

Change the format.
Keep the file.

Open your private workspace and complete your first conversion in the browser.

Open SoundToStory →