Online Audio Converter for MP3, WAV, M4A and OGG
Online audio converter in your browser: convert MP3, WAV, M4A, OGG and MP4 audio with no upload. Files never leave your device. Plus AI audio to text.
An online audio converter helps you make a listening copy in a format that suits your next task. Convert MP3, WAV, M4A and OGG files in your browser, or extract an MP3 soundtrack from a local MP4 video. Browser conversion is free and needs no account or upload. When your goal is written words or spoken narration, choose the separate AI transcription and speech tools instead. Those tools send content for AI processing and require an account with sufficient paid credits.
How the online audio converter works
Start by deciding what you want to keep: the sound, the words, or a spoken version of a document. A format change preserves an audio recording as audio. Transcription turns speech into an editable draft. Text to speech creates a new recording from writing. Choosing the right workflow prevents unnecessary conversions and helps you keep track of which version is your original. The online audio converter is the place to start when you already have a recording and simply need a different audio format.
Supported formats: MP3, WAV, M4A, OGG and MP4
MP3 is a practical listening format when a destination expects a familiar audio extension. WAV is useful for an uncompressed editing copy, although its size can be much larger. M4A stores audio in a container used by many recording applications. OGG provides another compressed option. An MP4 file can contain video and sound; extracting its audio produces a separate listening file and leaves the original video intact. Select the output that your destination actually accepts rather than assuming every application supports every format.
Audio to text and text to speech with AI
For an interview, use audio transcription to get timestamps and speaker labels, then review the words against the recording. For a presentation script, choose a voice and generate narration. The PDF workflow first extracts document text locally, then sends that text for speech generation. AI results need review: names, timing and pronunciation can be wrong. Check the pricing page for credit rates and plan options before planning an AI project. Local format conversion remains available independently of an AI credit balance.
Choose a tool for your file and goal
Convert audio formats
- MP3 Converter
Audio to MP3 converter that works in your browser.
- WAV to MP3
WAV to MP3 converter that runs on your device.
- M4A to MP3
M4A to MP3 converter for voice memos and iTunes audio.
- OGG to MP3
OGG to MP3 converter that works locally in your browser.
- MP4 to MP3
MP4 to MP3 converter that extracts the soundtrack from a local video file in your browser.
Audio and video to text
- Audio to Text
Audio to text converter powered by AI.
- MP3 to Text
MP3 to text with AI: upload a local MP3 recording for a transcript with timestamps and speaker labels.
- Speech to Text
Speech to text converter for recorded files: upload an interview, lecture or meeting and get an AI transcript with speaker labels and timestamps to export.
- Voice to Text
Voice memo to text: upload a voice memo, voice note or phone recording and get an AI transcript with timestamps.
- Video to Text
Video to text converter that transcribes uploaded video files with AI.
- AI Meeting Note Taker
Upload a meeting recording and the AI meeting note taker writes a transcript, summary, decisions and action items.
Text to speech and AI voice
- Text to speech (WAV or MP3)
Text to speech online: paste text or upload TXT, Markdown or PDF, pick an AI voice and download the narration as WAV or MP3 files.
- AI Voice Generator
AI voice generator for voiceovers and narration.
- PDF to Audio
PDF to audio converter: your browser extracts PDF text, then AI reads it aloud.
- AI Text Reader
AI text reader that turns articles, notes and long text into natural speech.
- AI Voice Changer
AI voice changer turns your recording into a different voice while keeping the words.
YouTube and social
- YouTube Transcript Downloader
YouTube transcript downloader that saves captions as clean TXT, with or without timestamps.
- YouTube Subtitle Downloader
Free YouTube subtitle downloader: paste a public link, pick a caption track and save SRT, VTT or plain text.
- YouTube Video Summarizer
AI YouTube video summarizer: get an overview and timestamped key points from a public video's transcript, then export TXT or Markdown.
- TikTok to Transcript
TikTok to transcript: paste a public TikTok video link and get an AI transcript with timestamps, then download TXT, SRT or VTT.
Online Audio Converter for MP3, WAV, M4A and OGG FAQ
Is the online audio converter free?
Yes. Local audio format conversion is free without sign-in. AI transcription and speech use paid credits and are separate from the local converter.
Does a format change improve a recording?
A new format can improve compatibility or reduce size, but cannot reconstruct missing sound detail. Keep a source copy for future edits.
Which tool makes subtitles?
Choose video or audio transcription, review the timed segments, then export SRT or VTT for a subtitle editor or player.
Where should I start with a voice memo?
Use local conversion when you need another audio format. Use voice memo transcription when you want the spoken words as editable text.