Decaly

How to convert an image to SVG on Android

An SVG is drawn with outlines, not pixels, which is what a cutting machine follows. Turning a PNG or JPG into one is called tracing. Here is how to do it on an Android phone, and how to tell whether the result will actually cut.

Written by the developer of Decaly · Published 21 October 2026

Short answer

To convert an image to SVG on Android you need an app that traces it: one that finds the edges of each colour and redraws them as outlines. Open the picture in the tracing app, choose how many colours and how much detail to keep, check the edges up close, set the size you will cut, and save the SVG. Renaming a .png to .svg doesn’t work, and an SVG that only wraps the original pixels inside it won’t cut.

Get Decaly Traces a picture into cut layers on your Android phone. Tracing is free, with no account.

Why a PNG can’t just be saved as SVG

A PNG or JPG is a grid of coloured squares. A cutting machine doesn’t cut squares; it follows lines. An SVG can hold either kind of thing: real outlines (paths), or an embedded picture. Some converters take the second route and wrap your PNG inside an SVG file. The file ends in .svg, but your machine’s software sees one rectangle and nothing to cut.

What you want is a traced SVG: each colour of the picture turned into closed shapes with smooth edges. That is what “image to vector” means, and it is the step that needs a real tracer.

The steps on a phone

These are the steps in Decaly; any tracing app has some version of them.

  1. Open the picture. In Decaly that is Open your picture (PNG, JPG, WebP or HEIC), the camera for a drawing on paper, or Share from any app that shows the image. A transparent PNG is placed on white, not black.
  2. Pick the number of colours. Each colour becomes one layer, which is one colour of vinyl or cardstock. Decaly reads the colours and lets you go from 1 to 7; most clip art and lettering needs 2 or 3. The paper colour, the one that runs along the picture’s border, counts as background and is not cut.
  3. Pick the detail. Simple smooths edges and drops tiny shapes; Fine follows the picture closely. More detail means more small pieces to weed.
  4. Look at the edges. Use the magnifier on curves and thin lines. Jagged steps mean the picture was too small (see why low-resolution images cut blocky).
  5. Set the real size. A trace is only cuttable at a size. A line that is fine at 10 inches can be too thin at 3 (how thin a blade can cut).
  6. Save for your machine. Choose where the file is going, not just the format: an SVG for Cricut Design Space, DXF files for Silhouette Studio, or a PNG for Print Then Cut.

What to check before you cut

  • One colour per layer. Open the file in your machine’s software and make sure each colour arrived as its own group or layer. If the whole thing is one black shape, the picture was traced to one colour (why an SVG comes out all black).
  • No dust. Tiny specks become tiny pieces your blade drags and your hook can’t lift. Decaly removes bits under 2 mm at the cut size by default.
  • The size. Decaly writes the SVG in inches at the size you set; check it in your software before you press Make or Send.
  • Stacked or side by side. For layered vinyl, decide whether the bottom colour runs under the others or each colour is cut only where it shows (how to layer vinyl without overlapping).

What a phone does well, and what it doesn’t

Tracing on a phone is good for the common job: a picture you already have, a few flat colours, a decal or a shirt by tonight. It is not a replacement for a desktop vector editor when you need to move individual points, redraw a letter or combine several designs; Decaly doesn’t edit nodes. And it doesn’t drive your machine: you open the saved file in your machine’s own app, which is where the cut settings live.

Decaly does the tracing on the phone. The picture is never uploaded, and you don’t need an account. Tracing and the preview are free, so you can see whether your picture traces well before deciding anything; saving the cut file is part of Decaly Pro, a weekly or yearly subscription.

Decaly: image to SVG, in layers you can cut

Open a picture on your Android phone and watch it trace into colour layers, free. Decaly Pro saves it as an SVG for Cricut Design Space, one DXF per layer for Silhouette Studio, or a PNG for Print Then Cut.

Get Decaly on Google Play