Video FPS Converter

Free open-source tool to change video frame rates without interpolation

Convert video frame rates (FPS) precisely using FFmpeg. Perfect for changing 30fps to 60fps, 24fps to 30fps, or any custom frame rate. Adjust playback speed, re-encode audio, and control video quality. No AI interpolation, no frame blending, no effects - just pure speed adjustment by changing how fast your video plays. Also works as a powerful video compressor to reduce file sizes without changing FPS. Your original files are never modified.

Download Latest Microsoft Store

Windows 10/11 macOS 10.15+

Free-FPS video converter interface showing FPS conversion settings, batch processing queue, and video quality controls for Windows and macOS

Why Use Free-FPS?

What is FPS Conversion Without Interpolation?

FPS (frames per second) conversion is the process of changing how fast a video plays back. Unlike AI-powered frame interpolation tools that generate new frames, Free-FPS simply adjusts the playback speed of your existing frames. This means:

  • Converting 30fps to 60fps makes your video play twice as fast (2x speed)
  • Converting 60fps to 30fps makes your video play at half speed (0.5x speed)
  • Converting 24fps to 30fps slightly speeds up your video (1.25x)
  • No artificial frames are created - only the playback timing changes

Video Compression Without Changing FPS

Free-FPS isn't just for changing frame rates - it's also an excellent video compressor! You can keep your original FPS and use the quality controls to significantly reduce file size:

  • CRF (Constant Rate Factor): Adjust compression level from 0 (lossless) to 51 (maximum compression)
  • Automatic bitrate calculation: Let the app choose optimal settings based on resolution
  • Maintain playback speed: Your video plays at the same speed, just with a smaller file size
  • Perfect for archiving: Reduce storage space while keeping acceptable quality
  • Web optimization: Create smaller files for faster uploads and streaming
  • Batch compression: Process multiple large videos at once to save disk space

Note: File size reduction comes from compression settings (CRF/bitrate), not from changing FPS. The app gives you full control over quality vs. size trade-offs.

Common Use Cases

  • Speed up slow-motion footage: Convert high FPS recordings (120fps, 240fps) to normal playback speeds
  • Match framerates for editing: Convert all clips to the same FPS (e.g., 30fps or 24fps) for smooth timeline editing
  • Create time-lapse effects: Increase FPS to make videos play faster without re-recording
  • Fix playback speed issues: Correct videos recorded at wrong frame rates
  • Compress videos: Keep the same FPS and use quality settings (CRF or bitrate) to reduce file size for archiving or web delivery
  • Platform requirements: Convert videos to specific FPS required by streaming platforms or video editors

Key Features

🎬

Precise FPS Control

Convert video frame rates with mathematical precision. Supports all common formats including MP4, MKV, AVI, MOV, WebM, and more. Set any target FPS from 1 to 240+ fps.

⚡

Batch Processing

Convert multiple videos simultaneously. Queue dozens of files and process them in parallel. Perfect for converting entire folders of footage at once.

🔊

Smart Audio Handling

Choose to preserve original audio speed or adjust it to match the new frame rate. Keep audio quality intact or re-encode for smaller file sizes.

🎨

Video Quality Control

Customize output quality with CRF (Constant Rate Factor) or automatic bitrate calculation. Also works as a video compressor to reduce file sizes without changing FPS.

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CPU Usage Management

Control how much CPU power the converter uses. Run conversions in the background while working on other tasks, or use maximum power for fastest results.

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Multi-language Interface

Available in 10 languages: English, Deutsch, Español, Français, Italiano, Polski, Português, Русский, Українська, Беларуская. Easy to use worldwide.

Screenshots

Free-FPS home screen with video selection and FPS conversion settings FPS converter advanced settings showing quality controls and output options Batch video processing showing multiple files being converted simultaneously Video FPS conversion progress with real-time processing statistics Detailed conversion progress view with frame rate and bitrate information Free-FPS help section with usage instructions and tips

Download Free-FPS Video Converter

Download the free FPS converter for Windows or macOS. No registration required, no trial limitations. Start converting video frame rates instantly with our FFmpeg-powered desktop application.

Windows

Windows 10 1809+ and Windows 11

Requires Microsoft Edge WebView2 runtime

GitHub Release Microsoft Store

First run: Windows may warn about the app. See instructions

macOS

macOS 10.15+ (Catalina or newer)

Intel and Apple Silicon supported

GitHub Release

First run: macOS may block unsigned apps. See instructions

User Guides

App User Guides (Multiple Languages)

Detailed instructions for using the Free-FPS desktop application in your language:

GB English DE Deutsch ES Español FR Français IT Italiano PL Polski PT Português RU Русский UA Українська ❤️‍🩹 Беларуская

Command-Line Scripts

Prefer the command line? Use our PowerShell and Bash scripts directly:

Windows Scripts PowerShell scripts for Windows Unix Scripts Bash scripts for macOS and Linux

Frequently Asked Questions

What's the difference between FPS conversion and frame interpolation?

FPS conversion (what Free-FPS does) changes the playback speed by adjusting timing between existing frames. Frame interpolation uses AI to generate new frames between existing ones. Free-FPS doesn't create artificial frames - it simply makes your video play faster or slower, which is useful for time-lapse effects, correcting recording speeds, or matching frame rates for editing.

Can I convert 30fps to 60fps without changing speed?

No, pure FPS conversion always affects playback speed. Converting 30fps to 60fps will make your video play at 2x speed. If you want to keep the same playback speed, you would need frame interpolation software (which generates artificial frames). Free-FPS is designed for speed-based conversion, perfect for slow-motion footage, time-lapse, or matching framerates for editing.

What video formats are supported?

Free-FPS supports all major video formats that FFmpeg can handle, including MP4, MKV, AVI, MOV, WebM, FLV, WMV, and many more. Input and output formats can be different - for example, you can convert an AVI file to MP4 while changing the frame rate.

Does it work with 4K and high-resolution videos?

Yes! Free-FPS can handle any resolution from SD to 8K and beyond. The processing speed depends on your computer's CPU power, but resolution doesn't affect the quality of FPS conversion. You can also adjust CPU usage to balance performance with system responsiveness.

Is Free-FPS really free? Are there any limitations?

Yes, Free-FPS is completely free and open-source (GPL-3.0 license). There are no file size limits, no watermarks, no trial periods, and no premium features. You can convert as many videos as you want. The project relies on community support and donations to continue development.

Do I need FFmpeg installed separately?

No! FFmpeg comes bundled with the application on both Windows and macOS. You don't need to install anything separately - just download Free-FPS and it's ready to use immediately. The app includes all necessary FFmpeg binaries, so you can start converting videos right away.

Support the Project

Free-FPS is open-source and completely free. If you find it useful, consider supporting the development: