SWF to WEBMConverter — Fast & Free Online

Convert SWF to WEBM to reduce file size for web upload or email. WEBM format offers open source.

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1CONVERTER Media Team·Audio & Video Specialists·Updated Mar 15, 2026

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How SWF to WEBM Conversion Works

The SWF file format stores data in the SWF format. Converting to WEBM produces a video file that packages VP8/VP9 or AV1 video with Vorbis/Opus audio in a royalty-free container designed for web streaming. This conversion changes the file's encoding, compression method, and supported feature set. Metadata such as creation date and embedded colour profiles is preserved where the target format supports it. This makes WEBM the practical choice when the destination system requires it or when the original format is not supported by the target application. 1converter runs this conversion on the server: your file is uploaded encrypted over HTTPS, converted using trusted open-source libraries, and the output is held for 24 hours before automatic deletion.

How to Convert SWF to WEBM

Follow these simple steps to convert your SWF files to WEBM format in seconds

Step 1

Drop your SWF file into the box above or pick it from your device

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Step 2

Confirm WEBM as the target format

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Step 3

Pick the resolution, codec, and bitrate for the WEBM video

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Step 4

Start the conversion and watch the live progress

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Step 5

Download the finished WEBM file — it is deleted from our servers after 24 hours

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Average conversion time: Less than 2 minutes

Visual Conversion Preview

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Source file

Size:2.4 MB

Format:SWF

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Converting...

~5s

webm

Output file

Size:0.9 MB

Saved:-64%

64%

Size Reduction

Processing Time

95%+

Quality Retained

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Choose Your Conversion Quality

Select the perfect balance between quality and file size for your SWF to WEBM conversion

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Low Quality

Smallest file, basic quality

File Size:Very Small

Speed:Very Fast

Quality Level

Recommended

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Medium Quality

Balanced size and quality

File Size:Medium

Speed:Fast

Quality Level

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High Quality

Larger file, great quality

File Size:Large

Speed:Moderate

Quality Level

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Maximum Quality

Largest file, best possible quality

File Size:Very Large

Speed:Slow

Quality Level

tips_and_updatesQuality Selection Tips

When to use Low/Medium:

•Web uploads and social media sharing
•Email attachments with size limits
•Quick previews and thumbnails

When to use High/Maximum:

•Professional printing and publishing
•Archive and long-term storage
•When quality is more important than size

Video Tip: Medium quality is ideal for web streaming. Use High or Maximum for videos you plan to edit further or archive.

Why Convert SWF to WEBM?

Discover the advantages of converting your SWF files to WEBM format

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SWF offers small files

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Reduce SWF file sizes with WEBM compression

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WEBM provides web optimized

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Batch process multiple SWF files at once

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No software installation needed for SWF to WEBM

Additional Features

243+

Supported Formats

<2 min

Average Time

24/7

Available

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