How to optimize SVG and check the result before downloading
Paste SVG source or open a local .svg file up to 2 MiB. The browser Worker runs SVGO with optional multipass optimization. Compare original and optimized previews and UTF-8 byte sizes before downloading.
How do you do it?
- Paste an SVG document or open a local .svg file. DTD declarations are not accepted.
- Choose whether to run multiple passes and select Run.
- Compare the previews and byte sizes, then copy or download the optimized SVG.
Remove redundant editor markup
SVGO can remove comments, shorten colors, and rewrite shapes. Exact serialized output depends on the adopted engine version.
Input:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"><!-- editor note --><rect width="10" height="10" fill="#0000ff"/></svg>
Output:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 10 10"><path fill="#00f" d="M0 0h10v10H0z"/></svg>When is this workflow useful?
Use this tool for vector SVG optimization. Use Image Compressor for JPEG, PNG, or WebP. Preserve originals and test SVGs that rely on external styles, animation, scripts, or font availability.
What should you check before relying on the result?
Optimization is not sanitization and does not establish that downloaded SVG is safe in other contexts. Source is previewed as an image, never injected as live page markup. IDs are preserved, but CSS, scripts, fonts, animation, and external references still require review in the target application.
What can go wrong?
| Problem | What to try |
|---|---|
| Optimization reports invalid XML. | Tags are unbalanced, the root is not SVG, or a DTD is present. Supply a well-formed SVG document without a DTD. |
| The result is not smaller or looks different. | Already optimized files offer little savings; fonts and external dependencies can affect display. Compare the result in its final application and keep the original when required. |
Frequently asked questions
Do I need to upload data or sign in?
No. Processing runs in the current browser. This site serves the page and required static engine assets.
Why does the result disappear after I edit the input?
The tool clears stale output so a previous result cannot be mistaken for the new one. Run again after changing input or settings.
References
First edition: steps checked against the current tool interface, with examples and known limits.