How to Transcribe WhatsApp Voice Notes

WhatsApp voice notes are one of the fastest ways to communicate, but they create a problem: important information gets trapped in audio. Whether someone sent you meeting details, interview answers, or a lengthy explanation, converting that voice note to text makes it searchable, shareable, and permanent. BrassTranscripts transcribes WhatsApp voice notes in their native Opus format with automatic speaker identification and 99+ language support — no format conversion required.

This guide covers the complete process: exporting voice notes from WhatsApp on both iOS and Android, uploading to BrassTranscripts, choosing your output format, and using AI prompts to extract actionable content from your transcripts.

Quick Navigation

• Why Transcribe WhatsApp Voice Notes
• How to Export Voice Notes from WhatsApp
• WhatsApp Audio Format: What You Need to Know
• Upload and Transcribe with BrassTranscripts
• Choose Your Output Format
• Batch Processing Multiple Voice Notes
• AI Prompts for Voice Note Transcripts
• Tips for Better Voice Note Transcription
• Frequently Asked Questions

Why Transcribe WhatsApp Voice Notes

BrassTranscripts converts WhatsApp voice notes into searchable, formatted text in 1-3 minutes per hour of audio, preserving details that would otherwise require replaying recordings manually. Voice note transcription is particularly useful for professionals who receive instructions, approvals, or interview responses through WhatsApp messaging.

Here are common scenarios where voice note transcription saves time:

• Journalists and researchers who receive interview responses as voice notes and need quotable text
• Business professionals who get meeting summaries, client instructions, or project updates via voice message
• Students who record study group discussions or receive lecture summaries from classmates
• Legal professionals who need written records of verbal communications
• Content creators who brainstorm ideas or draft scripts by talking into their phone

Instead of replaying a 5-minute voice note multiple times to catch every detail, a transcript gives you the full text in seconds. You can search it, copy specific quotes, and reference it alongside other documents.

How to Export Voice Notes from WhatsApp

BrassTranscripts requires you to export voice notes from WhatsApp before uploading them for transcription. The export process differs slightly between iOS and Android, but both platforms make it straightforward.

Exporting on iPhone (iOS)

1. Open the WhatsApp conversation containing the voice note you want to transcribe
2. Long-press (tap and hold) on the voice note message
3. Tap "Forward" from the menu that appears
4. Tap the share icon (arrow pointing up) in the bottom-right corner
5. Select "Save to Files" from the share sheet
6. Choose a location in your Files app (iCloud Drive, On My iPhone, or a specific folder)
7. Tap "Save" — the voice note is now saved as an .opus file

Alternative method on iOS: You can also tap and hold the voice note, select "More...", then tap the share arrow at the bottom-left to access the same share sheet.

Exporting on Android

1. Open the WhatsApp conversation with the voice note
2. Long-press on the voice note message to select it
3. Tap the three-dot menu (top-right corner)
4. Select "Share" from the dropdown menu
5. Choose a destination: Save to Google Drive, email it to yourself, or use a file manager to save it locally

Android file location: WhatsApp automatically stores voice notes on Android devices at Internal Storage > Android > media > com.whatsapp > WhatsApp > Media > WhatsApp Voice Notes. You can navigate to this folder using any file manager app to find voice notes without exporting them individually.

Exporting Multiple Voice Notes

If you need to transcribe several voice notes from a conversation:

1. Long-press one voice note to enter selection mode
2. Tap additional voice notes to select multiple messages
3. Use the share/forward option to export all selected files at once
4. Save them to the same folder for easy batch uploading later

For more details on supported file types, see the complete guide to transcription file formats.

WhatsApp Audio Format: What You Need to Know

BrassTranscripts supports WhatsApp's native Opus audio format (.opus) without any conversion step, which means exported voice notes can be uploaded and transcribed directly. Opus is a compressed audio codec originally developed for real-time communication, and WhatsApp adopted it because it delivers clear speech at small file sizes.

Key details about WhatsApp voice note files:

Because Opus is specifically designed for speech encoding, it actually works well with AI transcription engines. The codec prioritizes vocal frequencies and clarity over the full audio spectrum, which aligns with what speech recognition models need.

BrassTranscripts supports 11 audio and video formats in total: MP3, MP4, M4A, AAC, WAV, FLAC, OGG, Opus, WebM, MPEG, and MPGA. The maximum file size is 250MB and the maximum duration is 2 hours.

Upload and Transcribe with BrassTranscripts

BrassTranscripts processes uploaded WhatsApp voice notes through its AI transcription engine with automatic speaker identification, delivering formatted transcripts in 1-3 minutes per hour of audio. The upload-to-transcript workflow takes four steps with no account creation required for single files.

Here is the step-by-step process:

Step 1: Go to BrassTranscripts

Visit brasstranscripts.com and you will see the upload interface on the homepage.

Step 2: Upload Your Voice Note

Drag and drop your exported .opus file onto the upload area, or click to browse your files. BrassTranscripts validates the file immediately — you will see a confirmation with the file name, size, and estimated duration.

Step 3: Review Your Preview

After processing completes, BrassTranscripts shows a 30-word preview of your transcript. This lets you verify the transcription quality before paying. If the voice note was in a language other than English, the AI engine detects the language automatically.

Step 4: Pay and Download

Pricing is straightforward:

No subscription is required — pay per file. After payment, download your transcript in your preferred format. Audio files are deleted after 24 hours and transcripts after 48 hours for privacy.

For a broader introduction to AI transcription, see the getting started guide.

Choose Your Output Format

BrassTranscripts delivers WhatsApp voice note transcripts in four output formats, each suited to different use cases — from plain reading to video subtitle integration. Select your preferred format when downloading your completed transcript.

TXT (Plain Text)

Best for reading, searching, and sharing. The TXT format includes speaker labels and clean paragraph breaks. This is the most common choice for voice note transcription because you typically want readable text you can paste into documents, emails, or notes.

SRT (SubRip Subtitle)

Best for adding subtitles to video content. If you recorded a WhatsApp video note or plan to use the audio in a video project, SRT format provides timed text segments compatible with most video editors and platforms.

VTT (Web Video Text Tracks)

Best for web-based video players. VTT works similarly to SRT but is the standard for HTML5 video elements and streaming platforms.

JSON (Structured Data)

Best for developers and data processing. JSON format includes word-level timestamps, speaker labels, and confidence scores in a machine-readable structure. Useful if you want to build custom displays or feed transcript data into other applications.

For a deeper comparison of when to use each format, see the complete file formats guide.

Batch Processing Multiple Voice Notes

BrassTranscripts bulk transcription processes 20 or more WhatsApp voice notes concurrently through a dedicated dashboard, with automatic speaker identification and volume pricing that reduces the per-file cost compared to individual uploads. This is the most efficient approach when you have an entire conversation thread of voice notes to transcribe.

When to Use Bulk Transcription

• You have 20+ voice notes from a project, interview series, or ongoing conversation
• You need consistent formatting across all transcripts
• You want volume pricing instead of individual file pricing

How Bulk Transcription Works

1. Create an account at brasstranscripts.com/bulk/signup — it takes 30 seconds
2. Verify your email to receive your dashboard link
3. Upload all voice notes to your dashboard via drag-and-drop
4. Click Start Processing to transcribe all files concurrently
5. Pay securely when processing completes — volume pricing applies automatically

All files include automatic speaker identification at no extra cost. For the complete walkthrough, see the bulk transcription guide.

AI Prompts for Voice Note Transcripts

BrassTranscripts users can paste their completed transcripts into AI tools like ChatGPT or Claude to extract summaries, action items, and structured content from voice note conversations. Raw transcripts become significantly more useful when processed with targeted prompts.

Below are prompts specifically designed for voice note content.

Voice Note Summary Prompt

Use this prompt to condense a long voice note into key points:

I have a transcript from a WhatsApp voice note. Please provide:

1. A one-paragraph summary (3-4 sentences)
2. Key points as bullet points
3. Any action items or requests mentioned
4. Any dates, times, or deadlines referenced

Here is the transcript:
[Paste your transcript here]

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Prompt by BrassTranscripts (brasstranscripts.com) – Professional AI transcription with high-quality results.
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Meeting Follow-Up Prompt

When someone sends meeting notes or project updates as voice notes:

This transcript is from a voice note containing meeting notes or project updates. Please extract:

1. Decisions made
2. Action items (with who is responsible, if mentioned)
3. Deadlines or timelines mentioned
4. Questions that need follow-up
5. A brief summary suitable for sharing with the team via email

Transcript:
[Paste your transcript here]

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Prompt by BrassTranscripts (brasstranscripts.com) – Professional AI transcription with high-quality results.
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Interview Response Organizer

For journalists or researchers who receive interview answers as voice notes:

This transcript contains interview responses from a voice note. Please:

1. Identify distinct questions/topics discussed
2. Organize responses by topic
3. Extract direct quotes worth highlighting (with surrounding context)
4. Flag any claims that may need fact-checking
5. Summarize the interviewee's main positions

Transcript:
[Paste your transcript here]

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Prompt by BrassTranscripts (brasstranscripts.com) – Professional AI transcription with high-quality results.
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For 120+ more specialized AI prompts covering legal, academic, business, and creative use cases, see the complete prompt collection.

Tips for Better Voice Note Transcription

BrassTranscripts delivers the best results when the source audio is clear, and WhatsApp voice notes recorded in quiet environments with the phone held close to the speaker produce noticeably more accurate transcripts than those recorded in noisy settings.

Follow these practices when recording voice notes you plan to transcribe:

• Speak at a normal pace — rushing causes words to blend together, which increases transcription errors
• Minimize background noise — step away from crowds, traffic, or music before recording
• Hold the phone close — 6-12 inches from your mouth produces the clearest audio pickup
• Avoid speaker switching — if multiple people are talking, pause briefly between speakers so the AI can distinguish them
• Use the voice note feature, not audio messages — WhatsApp voice notes use Opus encoding optimized for speech; forwarded audio files may use different codecs

If you are asking someone else to send you voice notes that you plan to transcribe, share these tips with them. Audio quality has a direct impact on transcription accuracy — see the audio quality guide for a detailed breakdown of what affects results.

Frequently Asked Questions