54+ Languages Supported
Transcribe audio in over 54+ languages with native-level accuracy. Our AI understands accents, dialects, and regional variations to deliver precise transcriptions regardless of the source language.
In-Browser Transcript Editor
Polish your transcripts with our powerful web-based editor. Click any word to jump to that moment in your audio. Make corrections, adjust timestamps, and format your transcript without installing software.
Word-by-Word Timestamps
Every word is automatically timestamped with millisecond precision. Click any word to instantly play the audio from that exact moment—perfect for fact-checking and citation.
Speaker Identification
Sonix automatically detects when speakers change and separates dialogue into labeled paragraphs. Easily assign names to speakers with our dropdown menu for professional interview and meeting transcripts.
Automated Speaker Diarization
Our AI analyzes voice patterns to automatically identify who said what. Each speaker's dialogue is separated into distinct paragraphs—no manual work required.
Text Exports (DOCX, TXT, PDF)
Export your polished transcript in Microsoft Word, plain text, or PDF formats. Choose from multiple formatting options including timestamps, speaker labels, and paragraph styles.
Subtitle Exports (SRT, VTT)
Download your transcript as SRT or VTT subtitle files ready for YouTube, Vimeo, or any video platform. Customize timing, line length, and caption styling.
Upload Existing Transcripts
Already have a transcript? Upload it alongside your media file and Sonix will automatically synchronize the text to the audio, adding word-level timestamps to your existing content.
Notes & Commenting
Add timestamped notes and comments directly in your transcript. Perfect for collaboration, research annotations, or marking important moments for review.
Custom Dictionary
Add company names, technical terms, and industry jargon to your custom dictionary. Sonix prioritizes these words during transcription for higher accuracy on specialized content.
Multiple Custom Dictionaries
Create separate dictionaries for different clients, projects, or content types. Select the right dictionary during upload to optimize accuracy for each transcription job.
Automated Timecode Realignment
After editing your transcript, realign all timestamps with a single click. Sonix recalculates word timing to match your changes, keeping audio and text perfectly synchronized.
Multitrack Audio Uploads
Upload multiple audio tracks from the same recording session. Sonix combines them into a single transcript with speakers automatically labeled from each track.
What is AI transcription and how does it work?
AI transcription uses machine learning and neural networks to convert spoken audio into written text. Sonix's AI is trained on millions of hours of audio across different accents, languages, and recording conditions. When you upload a file, our AI analyzes the audio waveforms, identifies speech patterns, and converts them to text with word-level timestamps. The entire process takes approximately 5 minutes per hour of audio.
How accurate is Sonix transcription?
Sonix delivers up to 99% transcription accuracy for clear audio recordings. Our AI is independently verified as one of the most accurate automated transcription services available. Accuracy depends on audio quality, background noise, speaker clarity, and vocabulary. For specialized terminology, our Custom Dictionary feature lets you add industry-specific words to improve accuracy even further.
What languages does Sonix support for transcription?
Sonix supports transcription in 54+ languages including English, Spanish, French, German, Italian, Portuguese, Dutch, Japanese, Chinese, Korean, Arabic, Hindi, and many more. Our AI understands regional accents and dialects within each language. You can also transcribe multilingual audio where speakers switch between languages.
Can I edit transcripts after they're created?
Yes. Sonix includes a powerful in-browser editor where the transcript is synchronized with your audio. Click any word to jump to that moment in the recording. You can edit text, adjust speaker labels, correct timestamps, add notes, and format paragraphs. All changes save automatically, and you can export your polished transcript in multiple formats.
What file formats does Sonix accept?
Sonix accepts all major audio and video formats including MP3, MP4, WAV, M4A, FLAC, OGG, MOV, AVI, WMV, and WebM. Files up to 4GB can be uploaded directly. For larger files, you can upload via URL or connect cloud storage like Google Drive, Dropbox, or OneDrive.
How does speaker identification work?
Sonix's speaker diarization AI analyzes voice characteristics like pitch, tone, and speech patterns to identify when different people are speaking. The transcript is automatically divided into paragraphs for each speaker change. You can then assign names to each speaker using the dropdown menu, and those labels will appear throughout the transcript.
Transcribe in minutes, not hours
Our AI processes audio 12x faster than real-time. A one-hour recording takes about 5 minutes to transcribe completely—thousands of times faster than manual transcription.
99% accuracy you can depend on
Independently verified as one of the most accurate automated transcription services. Our AI is trained on diverse audio data to handle accents, technical vocabulary, and challenging recordings.
Professional editing tools
Our in-browser editor syncs text with audio for easy review. Click any word to hear that moment. Make corrections, add speaker names, and export to Word, PDF, SRT, and more.
Enterprise-grade security
SOC 2 Type II certified and HIPAA compliant. All files are encrypted in transit and at rest. Your data is never used to train AI models, and you can delete files permanently anytime.
Capture Anywhere
Record reliable, high-quality audio in clinics, meetings, or on the go.
Instant Transcripts
Speaker-labeled, timestamped text generated automatically for fast review.
What makes Sonix different from other transcription services?
Sonix combines the speed of AI with the editing tools professionals need. While other services give you raw transcripts, Sonix provides a complete workflow: accurate AI transcription, a synchronized editor for polishing, speaker identification, timestamps on every word, and export to 20+ formats. Plus, we're SOC 2 certified and HIPAA compliant for sensitive content.
Is Sonix suitable for professional and business use?
Absolutely. Sonix is used by 6.2 million+ users including journalists, researchers, lawyers, podcasters, and Fortune 500 companies. We offer team collaboration features, API access for automation, and enterprise plans with SSO and dedicated support. Our security certifications make Sonix suitable for handling confidential business content.
How does Sonix compare to hiring human transcriptionists?
Sonix costs a fraction of human transcription services. You get results in minutes instead of days. For most content, Sonix accuracy matches or exceeds human transcriptionists (99% accurate). When you need 100% accuracy, our editing tools make it easy to review and polish the AI transcript.
Can I try Sonix before purchasing?
Yes. Every new account gets 30 minutes of free transcription—no credit card required. Upload any audio or video file to experience Sonix's accuracy, speed, and editing tools firsthand. Most users are surprised by the quality and convert to paid plans to continue using the service.