Podcast networks
Normalize loudness across seasons, cut file sizes by 60%, and keep RSS feeds snappy for global listeners.
Podcast compression tipsCompress MP3 files in seconds with professional quality.
Drop an MP3, click compress, and grab the optimized version instantly. Fast server-side processing powered by FFmpeg ensures high-quality results with automatic file deletion for your privacy.
Fast server-side compression
Secure processing—files automatically deleted after compression.
Average compression: ~65% smaller
Engine: FFmpeg Server
Privacy: Files auto-deleted
Smart presets
Voice, music, and ultra compact profiles that tune bitrate for you.
Instant A/B preview
Listen to original and compressed audio without leaving the page.
Upload. Compress. Download.
Fast server-side compression using professional FFmpeg. Re-encodes audio at target bitrate while maintaining original duration.
Secure Processing: Your files are securely processed on our servers and automatically deleted immediately after compression. Fast, reliable, and secure.
Compression Presets
đź”’ Secure Server Processing
Your files are securely processed on our servers using professional FFmpeg compression. Files are automatically deleted immediately after compression completes. Fast, reliable processing with industry-standard encryption ensures your audio is handled safely and efficiently.
SMART COMPRESSION: DEFAULT - AWAITING COMPRESSION
How it works
Fast server-side MP3 compression engineered for clarity.
CompressMP3 uses professional FFmpeg compression on secure servers for fast, high-quality audio re-encoding. You control the quality with simple presets, we handle the technical details so your MP3s stay clean and consistent.
Learn more about our approachStep 1< 2 seconds
Upload your MP3
Securely upload your audio file to our compression server. Files are encrypted during transfer and automatically deleted after processing.
Step 23–5 seconds
Choose your preset
Select from simple presets optimized for different needs - Default, Best Compression, Good Compression, or Best Quality.
Step 3< 10 seconds
Download & preview
Get your compressed MP3 instantly after fast server-side processing. Preview the result and download with full quality preserved.
Why engineers love CompressMP3
Built for long-form creators, mixing engineers, and indie teams.
Preserve dynamics and clarity while delivering files that load fast, cost less to host, and keep your listeners happy on any connection.
Smart presets
Purpose-built profiles for podcasts, voiceovers, music masters, and lightning-fast preview files.
Audio preview
Listen to your compressed audio before downloading to ensure quality meets your standards.
Metadata safe
Keep ID3 tags and artwork intact—perfect for distributed catalogues and podcast feeds.
Instant download
Download your compressed audio file immediately after processing completes.
Quality control
Real-time compression with progress tracking ensures your audio maintains quality throughout processing.
Fast server processing
Uses professional FFmpeg compression on secure servers, ensuring fast processing and high quality results.
Built for audio teams
CompressMP3 slots perfectly into your mastering pipeline.
Whether you produce podcasts, ship promo packs, or maintain broadcast chains, we keep the technical pieces consistent so every MP3 you deliver hits the mark.
Indie labels
Ship promo MP3s with consistent metadata and reliable peaks for DJs, radio, and sync teams.
Mastering checklistLive radio
Feed satellite and online streams with high-compression files that still sound polished in mono or stereo.
Broadcast settingsFAQ
Questions, answered.
Everything you need to know about compressing MP3s with our fast server-side processing, keeping fidelity intact, and integrating the workflow into your release cycle.
Does CompressMP3 upload my files to a server?
Yes. Your files are securely uploaded to our compression server for processing. Files are automatically deleted immediately after compression completes. We use industry-standard encryption and never store your files permanently.
Which browsers are supported?
The experience is tuned for the latest versions of Chrome, Edge, Firefox, Arc, and Safari. We recommend Chrome or Edge for the best decoding performance.
Can I keep ID3 tags and cover art?
FFmpeg compression preserves basic audio data during compression. While some metadata may be lost during re-encoding, the core audio quality and duration are maintained.
How small can I make my MP3 without ruining it?
Voice content typically sounds great at 64–96 kbps. Music sounds good at 128–192 kbps. Use our smart presets as a starting point, then preview the result before downloading.
Can I compress multiple files?
You can compress multiple files during a session. Upload a file, compress it, download the result, then upload the next one. Each compression runs independently on our secure servers.
Is there an API or automation workflow?
We're building automation hooks aligned with the programmatic SEO library. Join the waitlist on the changelog page to get early access.
Ready when you are
Launch your next MP3 compression session in seconds.
Preload the compression engine, save your favorite presets, and ship cleaner audio faster. Bookmark CompressMP3 for your team or embed it into your programmatic SEO library.