# VoiceBrief
> VoiceBrief provides document audio and study tools, plus a separate VoiceBrief Video Studio for source-specific narrated MP4 and SCORM 1.2 course export.

## Primary Tools
- [PDF to MP3 converter](https://voicebrief.io/pdf-to-mp3): Upload a PDF, preview estimated audio length, and create downloadable MP3 audio for offline listening.
- [PDF to audio converter](https://voicebrief.io/pdf-to-audio): Convert PDFs into natural-sounding audio, preview read/listen time, and handle scanned PDFs with OCR after upload.
- [Slides to audio converter](https://voicebrief.io/convert/slide-presentations): Choose a local .pptx, reopen it safely in the dashboard, and continue into slide-order audio plus speaker notes when present.
- [Word to audio converter](https://voicebrief.io/word-to-audio): Choose a local .docx, reopen it safely in the dashboard, and continue into audio, MP3, and the study toolkit.
- [EPUB to audio converter](https://voicebrief.io/epub-to-audio): Choose a DRM-free EPUB, preserve its declared reading order, and continue into audio, MP3, and study tools. VoiceBrief does not remove or bypass DRM.
- [PDF to audiobook converter](https://voicebrief.io/pdf-to-audiobook): Analyze a PDF privately, check OCR readiness, build a downloadable 15-45 minute page-and-track cue sheet, then continue into audiobook-style audio and Pro MP3 export.
- [Webpage to audio converter](https://voicebrief.io/webpage-to-audio): Import a public article, blog post, or direct PDF URL into the private dashboard, review a free narration preview, and unlock full audio or MP3 export with Pro.
- [PDF to podcast converter](https://voicebrief.io/pdf-to-podcast): Choose a PDF locally, continue into the private uploader, and create a focused two-host conversation with a transcript and downloadable MP3 on Pro. Hear a real sample without an account.
- [AI study guide generator](https://voicebrief.io/study-guide-generator): Choose a PDF locally, check a bounded audio preview, then use the $19.99/month Pro Study Pack to create summary audio, a document-grounded quiz with flashcards, and study slides after full audio is ready.
- [AI document to video generator](https://voicebrief.io/video-export): Turn a PDF, DOCX, PPTX, public URL, or script into a topic-directed narrated 1080p MP4 plus a trackable SCORM 1.2 course. The public proof compares AI architecture, clinical training, and economic history to show that the script, type, graphic language, motion, and voice change with the source instead of reusing one template. Before payment, a free storyboard shows the named art direction, rationale, palette, expressive voice, and exact source-signal receipts. One-time purchase: $49 up to 10 minutes or $149 up to 30 minutes; no subscription required.
- [Complete source-to-course example](https://voicebrief.io/video-export/examples/fable5-cost-playbook): Watch a ten-page field guide become a complete 1:59 training course, then inspect the source signals, teaching decisions, knowledge check, action plan, topic-aware motion, expressive narration, captions, and delivery bundle behind it.
- [PDF to video converter](https://voicebrief.io/pdf-to-video): Convert an imported PDF or lecture notes into a source-grounded narrated MP4 and SCORM 1.2 course after reviewing the teaching script, evidence, voice direction, scenes, and useful runtime.
- [PowerPoint to video converter](https://voicebrief.io/powerpoint-to-video): Turn an imported PPTX into a narrated educational video and LMS bundle without claiming pixel-perfect slide preservation.
- [URL to video converter](https://voicebrief.io/url-to-video): Import a public article URL, review a source-specific storyboard, and export a narrated lesson video, captions, transcript, quiz, and SCORM 1.2 package.
- [AI training video generator](https://voicebrief.io/ai-training-video-generator): Turn a training manual, SOP, policy, PDF, DOCX, PPTX, or public article into a source-grounded, topic-directed training video and SCORM 1.2 course for L&D, HR, compliance, onboarding, and customer education.
- [AI video course generator from documents](https://voicebrief.io/ai-course-generator): Create one structured narrated video course from a PDF, Word file, PowerPoint, EPUB, public URL, or script, with topic-aware art direction, storyboard review, source receipts, quiz, captions, transcript, MP4, and SCORM 1.2.
- [PDF to SCORM converter](https://voicebrief.io/pdf-to-scorm): Turn a readable or OCR-ready PDF into a new narrated SCORM 1.2 course with playback resume, completion, quiz-score reporting, captions, transcript, and a separate MP4.
- [SCORM 1.2 course export](https://voicebrief.io/scorm-export): Package a VoiceBrief document-to-video lesson for compatible LMS platforms with resume position, completion, and quiz-score reporting.
- [Public SCORM 1.2 sample ZIP](https://voicebrief.io/video-export-demo/voicebrief-scorm-1.2-sample.zip): Download a sanitized 1.9 MB package containing the original 53-second topic-aware VoiceBrief demo, browser player, manifest, SRT and VTT captions, transcript PDF, and three-question quiz. It records resume position, completes after 95% playback plus quiz submission, and reports the quiz score. SHA-256: 9fe0b35bf0e5197bbd5f94bde34863ec699352b06c328747bb96b7821982d840.
- [Reading time calculator](https://voicebrief.io/tools/reading-time-calculator): Estimate reading time, listening time, word count, page count, and study planning time.
- [Embeddable reading time calculator widget](https://voicebrief.io/widgets/reading-time-calculator): Add the free responsive calculator to an HTML, WordPress, Webflow, library, publication, course, or LMS page that permits custom JavaScript. The versioned v1 widget requires no account or API key and makes no network requests after its script loads.
- [Text-to-speech time calculator](https://voicebrief.io/tools/text-to-speech-time-calculator): Estimate TTS, narration, and voiceover duration from text or word count with adjustable speaking rate, pause allowance, playback speed, and a reverse word-budget planner.
- [Text-to-speech app finder](https://voicebrief.io/tools/text-to-speech-app-finder): A deterministic browser-only selector comparing seven documented TTS options by source, output, device, account, budget, and explicit trade-offs.

## Helpful Guides
- [Accessible PDF-to-audio checklist](https://voicebrief.io/guides/accessible-pdf-to-audio): A 12-point preflight for PDF structure, OCR, reading order, non-text content, and narrated-audio quality assurance.
- [OpenStax audio options and license check](https://voicebrief.io/guides/openstax-to-audio): An independent, source-checked decision guide that prioritizes official audio and the accessible web view, checks the exact book license before conversion, and includes a browser-local attribution-note helper. VoiceBrief is not affiliated with or endorsed by OpenStax or Rice University.
- [How to convert a PDF to audiobook](https://voicebrief.io/blog/how-to-convert-pdf-to-audiobook): Free, MP3, scanned PDF, chapter-planning, and offline listening methods.
- [Listen to PDF offline](https://voicebrief.io/blog/listen-to-pdf-offline): How to download and organize PDF audio for offline listening.
- [Best text-to-speech apps 2026](https://voicebrief.io/blog/best-text-to-speech-apps-2026): A disclosed, source-checked comparison of Speechify, NaturalReader, ElevenReader, Microsoft Edge, Apple Read & Speak, and VoiceBrief by price, inputs, playback, MP3 export, and study workflow.
- [Best text-to-speech software for students](https://voicebrief.io/blog/best-text-to-speech-for-students): Comparison for students with long assignments, textbook PDFs, and study workflows.
- [Best free text-to-speech apps 2026](https://voicebrief.io/blog/best-free-text-to-speech-apps-2026): Compare free TTS apps for PDFs, students, MP3 downloads, browser reading, and natural AI voices.
- [AI voice vs human narration](https://voicebrief.io/blog/ai-voice-vs-human-tts): When AI voices work well for audiobooks, textbooks, and PDF audio.

## Original Research
- [PDF-to-audio accessibility benchmark](https://voicebrief.io/research/pdf-accessibility-benchmark): A reproducible seven-case extraction benchmark with raw results for reading order, scanned-page OCR, repeated headers and footers, table spacing, and line-break hyphenation. All seven current strict synthetic cases pass, including an interleaved two-column content stream; the narrow corpus is not a universal PDF accuracy claim.
- [Raw benchmark results](https://voicebrief.io/research-data/pdf-accessibility-benchmark-2026-07-30.json): Machine-readable methodology, environment, expected anchors, extracted text, pass/fail evidence, limitations, extraction source revision `c343c1cbfdb5`, and the CC BY 4.0 dataset license.

## Pricing
- Free plan: 1 saved document preview and 3 monthly preview minutes in the web player. No downloads or study-tool generations on Free. No credit card required.
- Pro: $19.99 per month for new subscriptions, billed monthly. Full PDF audio, MP3 downloads, summaries, chat, Teach Mode, and a one-click Study Pack that prepares summary audio, a quiz with flashcards, and study slides. Existing subscribers keep their current price.
- Standalone video export: $49 for a final video up to 10 minutes or $149 for a premium source-specific course video up to 30 minutes. Both one-time purchases include MP4, SCORM 1.2, captions, transcript PDF, and quiz bundle. Buying an export does not change an existing subscription.

## Integrations
- [VoiceBrief for Claude](https://voicebrief.io/integrations/claude): Connect Claude to a VoiceBrief account with per-user OAuth and a read-only MCP tool set for owned documents, study outputs, listening state, plan, and usage without pasting an API key.
- [VoiceBrief MCP technical reference](https://voicebrief.io/mcp.md): Endpoint, OAuth, supported inputs, complete tool inventory, compatibility aliases, and read-only safety boundaries.

## Comparisons
- [VoiceBrief vs Speechify](https://voicebrief.io/vs-speechify): How VoiceBrief compares to Speechify on pricing, voice quality, PDF support, and study tools.
- [VoiceBrief vs NotebookLM](https://voicebrief.io/vs-notebooklm): Differences from Google NotebookLM for document-based study workflows.
- [NaturalReader vs Speechify: Which Is Cheaper? (2026)](https://voicebrief.io/blog/voicebrief-vs-competitors): NaturalReader Lite and Speechify Premium monthly prices, free limits, OCR, MP3, speed, mobile support, and a disclosed VoiceBrief comparison.
- [Free vs Premium TTS](https://voicebrief.io/blog/free-vs-premium-tts): Where free text-to-speech tools quit on you and when paid tiers earn the upgrade.
- [AI voice vs human narration](https://voicebrief.io/blog/ai-voice-vs-human-tts): Where AI voices are practical and where human performance still wins.

## Governance
- [About VoiceBrief](https://voicebrief.io/about): Founder, product focus, contact information, and public accountability.
- [VoiceBrief product facts and review kit](https://voicebrief.io/product-facts): Canonical descriptions, supported inputs, current features, monthly pricing, voice names, limitations, and correction contact for directories, reviewers, partners, and AI systems.
- [Editorial policy](https://voicebrief.io/editorial-policy): Source hierarchy, comparison methodology, AI-assistance disclosure, update policy, and corrections process.
- [Accessibility](https://voicebrief.io/accessibility): Current accessibility approach, supported workflows, known limitations, and the barrier-reporting contact.
- [Privacy policy](https://voicebrief.io/privacy): How account data and uploaded documents are handled.
- [Terms of service](https://voicebrief.io/terms): Subscription, billing, and product-use terms.

## Key Facts
- VoiceBrief is a web app for PDF, DOCX, PPTX, EPUB, image, pasted-text, and public-webpage previews; full document audio; two-host podcasts; MP3 export; and a Pro study toolkit with summaries, chat, quizzes, flashcards, and Teach Mode.
- VoiceBrief Video Studio is a separate AI document-to-video generator with a free source-specific storyboard and paid one-time narrated 1080p MP4, SCORM 1.2 course export, captions, transcript, and quiz delivery.
- The free plan lets users save 1 document for preview and use 3 monthly preview minutes in-app without a credit card.
- MP3 downloads are a Pro feature for offline listening on phones, tablets, desktops, car audio, and podcast-style workflows.
- Scanned or image-heavy PDFs may need OCR before clean audio can be generated.
- VoiceBrief uses natural AI voices and may change underlying providers as quality and reliability improve.
- Video export is a separate one-time product, not a subscription tier. Paid artifacts use private, account-bound downloads.
- Private user documents, dashboards, API routes, and account pages are not public reference content.

## Brand
- Name: VoiceBrief
- Website: https://voicebrief.io
- Category: PDF to audio converter, text-to-speech study tool, AI audio learning app, AI document-to-video generator, SCORM 1.2 course export
- Founder: Deep Mehta
- Location: United States