How to Convert MP3 and MP4 Files to Text Transcripts

Converting Audio and Video Files to Text

You have an MP3 or MP4 file and need the words in text form. Maybe it's a recorded interview, a podcast episode, a lecture, a meeting recording, or a downloaded video. Whatever the source, AI transcription makes the conversion fast and affordable.

This guide walks through the best way to convert MP3 and MP4 files to text, with step-by-step instructions and tips for getting the most accurate results.

What File Formats Can Be Transcribed?

Here's a quick reference of common audio and video formats that Exactum accepts:

Audio formats: MP3, M4A, WAV, FLAC, OGG, AAC, WMA, AIFF Video formats: MP4, MOV, AVI, MKV, WebM, WMV, FLV

You don't need to convert your files before uploading — Exactum handles the format conversion internally. In total, Exactum supports 100+ audio and video formats, so even less common file types are covered.

Understanding the Difference Between Audio and Video Transcription

When you upload a video file like MP4 or MOV, Exactum extracts the audio track and transcribes the speech from it. The visual content of the video is not analyzed — only the spoken words. This means the transcription process is essentially the same for audio and video files, and the output quality depends entirely on the audio track's clarity.

If you're working specifically with video content and want to explore all your options, our roundup of the best video transcription tools covers the full landscape.

How to Convert MP3/MP4 to Text with Exactum

Exactum converts MP3 and MP4 files to text using an AI-powered speech engine that delivers 99%+ accuracy — one of the most accurate transcription platforms available.

Step-by-Step

1. Go to Exactum and log in (or start a free plan)
2. Upload your file — drag and drop your MP3 or MP4 file. No file conversion needed.
3. AI processes the file — the engine extracts speech, detects speakers, adds punctuation and formatting. A 1-hour file typically processes in under 10 minutes.
4. Review the transcript — the text appears with timestamps and speaker labels. Click any segment to jump to that point in the audio.
5. AI analysis — automatically generates summaries, chapters, key points, sentiment analysis, and more
6. Export — download as TXT, DOCX, PDF, SRT (subtitles), or VTT

What Makes Exactum the Best Option

• 99%+ accuracy — AI-powered speech engine delivers word-perfect transcripts
• No file format conversion needed — upload MP3, MP4, WAV, M4A, and 100+ formats directly
• Speaker detection — automatically identifies and labels different speakers in the recording
• Smart formatting — numbers, dates, and proper nouns are formatted naturally
• Full AI analysis included — every file gets 3-level summaries, chapters with timestamps, key points, sentiment analysis, fact-checking, mind maps, and more at no extra cost
• 27 content repurposing templates — turn transcripts into blog posts, social threads, newsletters, and more
• YouTube video transcription — unlimited on all paid plans via Chrome extension
• Subtitle export — export as SRT, VTT, TXT, PDF, DOCX, or Markdown
• Publish to WordPress/Ghost — push content straight to your blog
• Notion, Zapier, Google Drive, Dropbox integrations — fits into your existing workflow
• Affordable — plans from $6.99/month for 2 hours, up to $79.99/month for 60 hours

Why Not Other Tools?

You might be considering alternatives. Here's why they fall short for MP3/MP4 transcription:

Descript

Pricing: $16-24/month

Descript is a full video editor that includes transcription. If you just need a transcript and don't need to edit your media, you're paying for an entire editor you won't use. Plus, it has no AI summaries, chapters, or analysis — just raw text. For a deeper comparison, see Exactum vs Descript.

Rev

Pricing: $29.99/month

Rev starts at more than 4x Exactum's price. They offer human transcription at $1.99/minute, but for a 1-hour file that's $119.40. Their AI analysis features cost extra on top of the subscription. For details on exactly how the two platforms compare, read our Exactum vs Rev breakdown.

Sonix

Pricing: $10/hour (no subscription)

Sonix charges $10/hour with no subscription. Sounds simple, but it adds up fast — 10 hours of transcription costs $100. And there's no AI analysis without a separate $5/month add-on.

Quick Comparison

Feature	Exactum	Descript	Rev	Sonix
MP3/MP4 upload	Yes (100+ formats)	Yes	Yes	Yes
Accuracy	99%+	Good	Good	Good
Speaker detection	Yes	Yes	Yes	Yes
AI summaries	Yes (3 levels)	No	Extra cost	$5/mo add-on
Chapter markers	Yes	No	No	No
Sentiment analysis	Yes	No	Extra cost	No
Fact-checking	Yes	No	No	No
Mind maps & topics	Yes	No	No	No
YouTube transcription	Unlimited (paid)	No	No	No
Content repurposing	27 templates	Video clips	No	No
SRT/VTT export	Yes	Yes	Yes	Yes
WordPress/Ghost	Yes	No	No	No
Notion & Zapier	Yes	No	No	No
Starting price	$6.99/mo	$16/mo	$29.99/mo	$10/hour

If you also work with YouTube content, check out our list of the best YouTube transcript generators — Exactum's Chrome extension provides unlimited YouTube transcription on all paid plans.

How to Get the Best Results from Your Files

Audio Quality Matters Most

The accuracy of any transcription tool depends primarily on the audio quality of your file:

• Clean audio with minimal background noise produces the best results
• Single speaker recordings are easier to transcribe than group conversations
• Consistent volume — avoid recordings where speakers move away from the microphone
• Standard accents — AI engines handle common accents well but may struggle with very heavy or regional accents

Pre-Processing Tips

If your audio quality is poor, a few simple steps before uploading can improve results:

• Normalize audio levels — if the volume varies dramatically, use a free tool like Audacity to normalize it
• Reduce background noise — Audacity's noise reduction filter can clean up recordings with consistent background hum
• Split very long files — while Exactum handles files up to 8 hours (Creator plan), splitting extremely long recordings into logical segments can make the transcript easier to work with

Choosing the Right Export Format

Format	Best For
TXT	Simple copy-paste into documents
DOCX	Sharing via email, further editing in Word
PDF	Archiving, printing, sharing read-only documents
SRT	Adding subtitles to video in editing software
VTT	Web video subtitles (HTML5 video players)

When to Use Subtitles vs Full Transcripts

If your goal is adding captions to a video for social media, YouTube, or a website, you want SRT or VTT subtitle files rather than a plain text transcript. Subtitle formats include timing information that syncs each line of text with the corresponding moment in the video. Exactum generates both automatically from the same upload — you don't need to process the file twice.

For written content like meeting notes, blog posts, or study materials, TXT, DOCX, or PDF are better choices because they prioritize readability over timing.

Common Use Cases for MP3/MP4 Transcription

Podcast Transcription

Podcasters convert episodes to text for show notes, blog posts, SEO content, and accessibility. A transcript makes your podcast content discoverable by search engines and accessible to deaf or hard-of-hearing audiences. With Exactum's 27 repurposing templates, you can turn a single episode into multiple pieces of content — blog posts, social threads, email newsletters — without rewriting anything from scratch.

Lecture and Course Transcription

Students and educators transcribe lectures to create study guides and reference materials. The AI-generated chapter markers are especially useful for lectures, letting you jump directly to the section covering a specific topic. If you record voice memos of your study notes, you can also transcribe those to text for a complete study library.

Meeting and Interview Transcription

Business professionals transcribe meetings and interviews to maintain accurate records, extract action items, and share outcomes with stakeholders who couldn't attend. Speaker detection labels who said what, which is critical for meetings with multiple participants. The AI summary gives you a concise recap you can share immediately without reading the full transcript.

Content Repurposing

Content creators transcribe video and audio content to repurpose it across platforms. A single podcast episode or video can become a blog post, a Twitter thread, a LinkedIn article, an email newsletter, and more — all generated from the transcript using Exactum's built-in templates.

Frequently Asked Questions

Do I need to convert my files before uploading?

No. Exactum accepts MP3, MP4, and 100+ other audio and video formats directly. The platform handles all format conversion internally, so you can upload files exactly as they are. For a complete overview of all supported formats, visit the audio-to-text converter page.

How long does it take to transcribe a 1-hour file?

A 1-hour file typically processes in under 10 minutes. Shorter files are faster — a 10-minute recording usually takes under 2 minutes. The exact time depends on server load and audio complexity.

What's the maximum file length I can transcribe?

This depends on your plan. Free trial: 30 minutes, Basic ($6.99/mo): 2 hours, Starter ($11.99/mo): 4 hours, Creator ($29.99/mo): 8 hours, Studio ($79.99/mo): unlimited. See all plan details on the pricing page.

Get Started

Converting MP3 and MP4 files to text takes minutes with Exactum. Upload your file, let the AI process it, and get a transcript with timestamps, speaker labels, and AI analysis.

Try Exactum free — upload an MP3 or MP4 file and see the results.