Optimize and compare SVG in the browser
Load SVG code or one .svg file, choose settings, and compare rendering, size, and changes before and after optimization. Input is not sent to the server.
Open SVG optimization/compression toolConclusion: Review the exported code and optimize it for each use case
Figma export results vary by design content and export method. Some may contain unnecessary groups or long values, while others are already concise, so do not uniformly conclude that “Figma SVG is heavy.”
Keep the Figma file for editing and the source SVG, and optimize only the copy for publication. Check that lines and corners of UI icons do not break down even at small display sizes.
Markup to check
| Item | Confirmation details |
|---|---|
| viewBox | Whether it encloses the entire shape and is needed in responsive display |
| group | Whether it has transform or style, or is only nesting without attributes |
| path | Whether there are long decimals or duplicates, and whether the precision affects appearance |
| ID | Whether it is referenced by gradients, masks, clipPath, ARIA, or external CSS |
| fill and stroke | Whether a fixed color is appropriate, or whether it should use currentColor as a component |
currentColor changes the usage approach, not file size
Changing fill="#000" to fill="currentColor" lets you control icon color through the parent element's color. However, do not automatically convert multicolor logos or fixed brand colors.
Current DevelopTools does not automatically change fixed colors to currentColor. If needed, make the change manually as a design decision and check normal, hover, disabled, and dark mode.
How to check Figma SVG
- Check the target layer boundaries and Export settings in Figma.
- Record the original SVG's viewBox, path count, IDs, colors, and editing information.
- Optimize with the safe preset and check the change report.
- Compare at actual display sizes such as 16px and 24px, and in dark mode.
What DevelopTools can verify and its supported scope
DevelopTools' SVG optimization and compression tool does not embed SVGO. It parses SVG with DOMParser and applies its own optimization processing. It supports pasting SVG code and inputting one .svg file, with all processing completed in the browser.
| Items to check and configure | Support in the current Tool |
|---|---|
| Basic organization | Organize comments, metadata, editor-specific information, whitespace, and empty attributes/elements |
| Numbers and colors | Set decimal precision from 0 to 8 places, and normalize numeric values and shorten-able color codes |
| structure | Clean up unused defs, groups without attributes, and unused IDs, and shorten referenced IDs |
| Safety | Configure handling for scripts, event attributes, external references, foreignObject, and animations |
| Protection settings | Choose whether to retain title, desc, and viewBox |
| verification | Display before-and-after previews, overlays, file size, element count, and change reports |
Batch processing of multiple files, SVGO preset-default and arbitrary plugin settings, path-command conversion by convertPathData, prefixIds, mergePaths, and build-pipeline integration are not supported. Perform these on the SVGO or build-tool side.
After optimization, verify size and display separately
- Duplicate the original SVG so that the editable original is not overwritten.
- First run with a safe preset, then check the before/after size, element count, and change report.
- Check shape, color, margins, and missing parts using transparent, white, and black backgrounds and an overlay display.
- Integrate it into the actual page, then check responsive rendering, CSS, JavaScript, accessibility, and use alongside multiple SVGs.
- If there is a problem, revert settings one at a time and isolate the processing that caused the display difference.
Even if file size is reduced, optimization is not successful if display, references, licenses, or accessibility are broken.
Primary sources used to verify the specification
SVGO Plugin configurations and defaults vary by Version. This article is based on official SVGO v4 documentation, but when adopting it, check the Documentation and configuration file for the Version you use.
Example: reduce the size of a 24px navigation icon
An icon exported from Figma contains groups and long decimal values. Rather than selecting maximum compression from the start, save the original file and determine what to remove and retain.
Preserve viewBox, and consider currentColor support for monochrome parts only in a separate step. After optimization, do not judge only by the reduction rate; check 16px and 24px rendering, stroke width, hover color, and dark mode before replacing the production file.
- Duplicate the source SVG for editing, then check its purpose and reference relationships.
- Load SVG code or one file and start with the safe preset.
- Check the change report and optimized code to determine whether required information remains.
- Compare the before-and-after preview with the actual usage screen, and save under a different name if there are no issues.
Do not mechanically apply the same settings to every SVG; validate separately by use case, such as logos, icons, charts, and animations.
Frequently asked questions
- Should SVG exported from Figma always be optimized?
- Not required. Check capacity, code, and display, and optimize the public copy when there is room for reduction and it remains maintainable.
- Can it be automatically converted to currentColor?
- Current DevelopTools does not convert automatically. Make a manual decision as part of the icon design change.