Voicifier

Inspiration We often find ourselves with long PDFs or pitch decks that we don’t have time to read. Whether it's during a commute or while multitasking, sometimes it's just easier to listen than read. That’s where the idea for Voicifier came from — a tool that takes in a document and gives you a voice summary without any hassle.

What it does Voicifier lets you upload a PDF or PowerPoint file and instantly generates a voice summary of the content. It breaks down the key ideas and turns them into a short, easy-to-understand audio format. All of this happens in a single step — no extra setup, no tweaking, just upload and listen.

How we built it We built Voicifier using Bolt’s single prompt capability. The app uses the Gemini API to analyze the content of the file, extract important points, and then generate a text summary. That summary is passed through a text-to-speech API to produce the audio. Everything — from file processing to voice generation — is handled through one prompt.

Challenges we ran into The biggest challenge was making sure the summaries were clear and meaningful, especially with slides or documents that rely heavily on visuals. Handling inconsistent formatting and keeping the response time reasonable for large files was also tricky.

Accomplishments that we're proud of We're proud that everything works through a single prompt — no backend, no extra steps. The fact that it supports both PDFs and PowerPoint files makes it useful for a wide range of people. And most importantly, the voice summaries actually sound natural and are easy to follow.

What we learned We learned that the way you structure a prompt really matters. With the right setup, a single prompt can replace a whole backend flow. We also saw how powerful Gemini is when it comes to understanding and summarizing content in context.

What's next for Voicifier We want to add more features like choosing different voice styles, adjusting summary length, and supporting other file types like videos or articles. A mobile version is also on the roadmap so people can use it on the go. Eventually, we’d like to integrate with email and chat platforms to auto-summarize attachments.