ICO to SVG Converter

How to Convert ICO to SVG Online

1. Upload Your ICO File: Drag and drop your .ico icon, or click "Add Files" to select one. The converter accepts standard Windows ICO containers (BMP or PNG-encoded internal frames, up to 256x256). Batch upload is supported — every file processes independently and you can download them all at the end.
2. Set Number Precision: This is the only knob under Advanced Options. The slider goes 1-10 and defaults to 6 — that controls how many decimal places appear in the SVG path coordinates. Higher precision (8-10) preserves curve detail at the cost of larger files. Lower precision (1-3) snaps coordinates to coarser positions, producing smaller but blockier output. 4-6 is the sweet spot for most icons.
3. Pick the Source Frame (Automatic): ICO is a multi-image container. The converter reads the highest-resolution frame inside your .ico file (typically 256x256 or 48x48), which is the same frame Windows shows when rendering large icons. You don't choose this manually.
4. Convert and Download: Click "Convert." The output is a single .svg file per input. Files process in-session — no sign-up, no watermark, and the .ico isn't kept on our servers after the job clears.

What This Tool Actually Does (and Doesn't)

Be honest about the limit here: ICO is a raster format (pixel grid), and SVG is a vector format (mathematical paths). True raster-to-vector conversion requires tracing — analyzing edges, quantizing colors, and emitting <path> elements. This converter performs that trace-based vectorization on the highest-resolution frame of your ICO, similar to the vtracer approach. It works beautifully for flat, low-color icons and poorly for photo-like icons.

If your goal is just a scalable wrapper around the original bitmap, that's a different operation — you'd embed the ICO's PNG frame inside an <svg><image .../></svg> wrapper, which scales without re-rasterizing but doesn't gain crisp edges. Most conversions you actually want belong in the tracing bucket.

Why Convert ICO to SVG?

• Crisp favicons on retina and 4K displays — A 32x32 .ico file looks soft when a browser scales it for a high-DPI tab; an SVG favicon stays sharp at any pixel ratio. Chrome 80+, Firefox 41+, Edge 80+, and Safari 17+ (released September 2023) all render <link rel="icon" type="image/svg+xml">. Keep a .ico fallback for older Safari and legacy browsers — see SVG to ICO for the reverse.
• CSS-themed icons (dark mode) — SVG accepts CSS targeting, so a single favicon can respond to prefers-color-scheme: dark and recolor its strokes. Impossible with a flat .ico.
• Editable in code — SVG is XML text. Change a fill color, swap a path, or animate a stroke without re-running a converter or opening a bitmap editor.
• Smaller files for simple icons — A monochrome chevron is often 200-800 bytes as SVG versus 2-15 KB as a multi-resolution ICO.
• Design-tool compatibility — Figma, Illustrator, Inkscape, Sketch, and Affinity Designer import SVG as editable paths. ICO usually imports as a flattened bitmap layer.
• Single asset for all sizes — Replace favicon-16.png, favicon-32.png, favicon-48.png, and favicon.ico with one favicon.svg.

ICO vs SVG — Format Comparison

What Converts Well (and What Doesn't)

Number Precision — How to Pick

Frequently Asked Questions

Why does my converted SVG look blocky or pixelated?

ICO files are tiny — usually 16x16 to 256x256 pixels. A vector tracer can only follow edges that exist in the source. If the original frame is 16x16, the tracer is working from 256 pixels, so a circle gets approximated as a polygon with visible facets. For better results, convert from a higher-resolution source: extract the 256x256 frame, or start with a PNG to SVG on a larger PNG of the same icon.

Does the SVG embed the original bitmap or trace it into paths?

This tool traces — it analyzes the highest-resolution frame, quantizes colors, and emits real <path> elements. The output is a true vector with no embedded raster. If you wanted the embedded-bitmap approach (which would scale without re-tracing but stay pixelated when zoomed), you'd hand-write the SVG with a base64-encoded <image> tag.

How does the tool choose which frame inside the ICO to trace?

ICO is a container that can hold multiple bitmaps at different resolutions (16, 24, 32, 48, 64, 128, 256). The converter picks the largest available frame because more source pixels mean a more accurate trace. If your .ico only contains a 16x16, that's what gets traced — and the result will be limited by that detail.

Can I use the output as a favicon directly?

Yes — for Chrome, Firefox, Edge, and Safari 17+ on desktop. Reference it with <link rel="icon" type="image/svg+xml" href="favicon.svg">. iOS Safari support is partial as of iOS 17; older iOS, IE, and legacy Android browsers ignore SVG favicons entirely. The standard pattern is to ship both: SVG declared first for modern browsers, then ICO fallback at /favicon.ico. Use SVG to ICO to generate the fallback.

Will transparent areas be preserved?

Yes. The 8-bit alpha channel from the ICO is read during tracing, and transparent regions become uncovered SVG canvas (no <rect> fill behind the paths). Semi-transparent pixels (anti-aliased edges) are clamped to either filled or empty during quantization, so very soft edges may sharpen.

What's the maximum ICO file size and dimensions?

Per Microsoft's spec, an ICO frame maxes at 256x256 pixels. The .ico container can technically hold many frames and grow into the megabytes, but the input cap for this tool is the standard upload limit shown on the homepage. Most real icons are under 200 KB.

Why does the SVG have so many <path> elements?

The tracer creates a separate path for each contiguous color region. An icon with 5 visible colors typically produces 5-15 paths after merging. Icons with gradients or anti-aliasing get many more — gradient bands become layered paths, and aliased halos become slivers. Lower the Number Precision slider, or pre-process the ICO to a flat palette using Compress ICO before converting, to reduce path count.

Can I batch convert a folder of .ico files?

Yes. Drop them all into the upload area in one go; each is converted independently. You'll get one .svg per .ico. Same Number Precision setting applies to every file in the batch — if you need different settings, run them in separate batches.

Is the conversion reversible — can I go back to ICO?

You can convert SVG to ICO with SVG to ICO, but it's a lossy round-trip. The SVG gets rasterized at standard icon sizes (16, 32, 48, 256) and re-encoded into an ICO container. The path data is discarded. Don't round-trip if you can avoid it — keep the original .ico as the master if you'll need .ico again.