Convert MP3 Audio to SRT Subtitles

Upload your audio and let PDF Maxi generate perfectly timed subtitles in seconds. Great for podcasts, accessibility, and social media videos.

Auto-Sync Timestamps

Speaker Detection

Export SRT & VTT

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MP3 to SRT Converter — Audio to Subtitles Online | PDF Maxi

Upload MP3. Drag your MP3 file into PDF Maxi. We handle recordings of any length, from quick voice notes to hour-long podcast episodes.

AI Transcribes & Syncs. Our AI listens, types, and aligns every word to the millisecond. It figures out who is speaking and nails the timing automatically.

Download SRT. Check the captions, tweak nuances in the editor if you want, and export your polished SRT or VTT file instantly.

あなたの完全な音声・動画ツールキット

書き起こし、変換、抽出 — 音声・動画のすべてを一箇所で処理。

AI書き起こし

話者ラベル、タイムスタンプ、95%以上の精度で音声をテキストに。

フォーマット変換

MP3、WAV、M4A、OGG、FLAC — 任意の音声または動画フォーマットを瞬時に変換。

動画から音声へ

MP4、YouTube、Zoom録音などから音声を抽出。

超高速

ほとんどのファイルは3分以内に処理。待ち時間なし。

登録不要

すぐに開始

100%安全

自動削除

ブラウザベース

インストール不要

このツールを愛用する人々

ポッドキャスター、研究者、マーケター、リモートチームが毎日利用しています。

Feb 15

Podcast lifesaver

I turn my podcast episodes into YouTube shorts. PDF Maxi generates the SRTs in seconds, saving me hours of manual syncing.

Dave Miller

Jan 22

Shockingly accurate

I uploaded a messy voice memo recorded outside. PDF Maxi still caught 98% of the words and timed them perfectly. Wild.

Sarah Jenkins

Feb 5

Great for accessibility

We need transcripts and captions for all our training audio. PDF Maxi makes it affordable and fast. Highly recommend.

Michael O’Connor

824 人が今日ファイルを文字起こしました

読み込み中...

信頼され、認定された業界のリーダー

なぜこの音声・動画ツールを選ぶのか

Podcast to Video

Turning audio into video clips? PDF Maxi gives you the subtitles you need to make your audiograms pop on Instagram and TikTok.

Global Reach

Don’t limit your audience. Translate your audio subtitles into 100+ languages and let the whole world tune in.

Blazing Fast

Waiting is boring. PDF Maxi processes audio about 40x faster than real-time. A 60-minute file is done while you grab a coffee.

Make It Accessible

Subtitles aren’t just cool; they are necessary. Make your content accessible to the hard of hearing with zero extra effort.

Editor Included

Use our visual editor to fine-tune timings, correct names, or adjust line breaks. You have total creative control.

Secure & Private

Your audio is your business. We encrypt uploads and permanently delete files after processing. No one listens but the AI.

Podcast to Video

Turning audio into video clips? PDF Maxi gives you the subtitles you need to make your audiograms pop on Instagram and TikTok.

Global Reach

Don’t limit your audience. Translate your audio subtitles into 100+ languages and let the whole world tune in.

Blazing Fast

Waiting is boring. PDF Maxi processes audio about 40x faster than real-time. A 60-minute file is done while you grab a coffee.

Make It Accessible

Subtitles aren’t just cool; they are necessary. Make your content accessible to the hard of hearing with zero extra effort.

Editor Included

Use our visual editor to fine-tune timings, correct names, or adjust line breaks. You have total creative control.

Secure & Private

Your audio is your business. We encrypt uploads and permanently delete files after processing. No one listens but the AI.

MP3 to SRT Online

登録不要。ツールを選んで始めましょう。

Convert MP3 to SRT

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4.5

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4.6

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よくある質問

音声・動画の書き起こしと変換ツールに関する簡単な回答。