SWF to WEBP Converter

Convert SWF to WEBP online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

or drag and drop files here

Maximum file size is 1GB

How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is an SWF file?

SWF (Small Web Format, originally Shockwave Flash) is a binary file format for multimedia, vector graphics, and ActionScript execution, originally developed by FutureWave Software and later acquired by Adobe Systems. It serves as the compiled delivery format for Adobe Animate (formerly Flash) and relies on the SWF file structure specification to define tags for display lists and control bytes. Adobe officially ended support (End of Life) for the Flash Player runtime on December 31, 2020, rendering SWF files obsolete for web use due to security vulnerabilities and the shift to HTML5 standards.

How to open an SWF file

Modern web browsers (Chrome, Edge, Safari) strictly block SWF execution. To open legacy SWF files, users must rely on the standalone Adobe Flash Player Projector (content debugger) or open-source emulators like Ruffle, which runs Flash content via WebAssembly. For video-only SWF files not relying on complex ActionScript interactivity, VLC media player can often decode the embedded video streams.

SWF Technical Info

Full Name: Small Web Format
Developed By: FutureWave / Macromedia / Adobe
Initial Release: 1996
MIME Type: application/x-shockwave-flash

What is a WEBP file?

WebP is a raster graphics file format developed by Google specifically for web optimization, utilizing the Resource Interchange File Format (RIFF) container. It employs predictive coding based on the VP8 video codec for lossy compression and the LZ77 algorithm with entropy coding for lossless compression. WebP supports transparency (alpha channel) in both lossy and lossless modes, as well as animation, often achieving file sizes 26-34% smaller than comparable JPEG or PNG files while maintaining high structural similarity (SSIM) index scores.

How to open a WEBP file

WebP is natively supported by all modern web browsers, including Google Chrome, Mozilla Firefox, Microsoft Edge, and Apple Safari. For offline viewing, Windows 10 and 11 support WebP via the Photos app (often requiring the Webp Image Extensions package), while macOS users can view them in Preview (macOS Big Sur and later). Legacy systems or incompatible editors require conversion tools or third-party viewers like IrfanView to render the image data.

WEBP Technical Info

Full Name: Web Picture
Developed By: Google
Initial Release: 2010
MIME Type: image/webp

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert SWF to WEBP in seconds

Every SWF to WEBP conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Developer API

Convert SWF to WEBP via API

Automate SWF to WEBP conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "swf-to-webp",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "webp"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.swf

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.