Free online PNG to EXP converter

An embroidery machine or production program may require Melco EXP stitch data instead of a PNG image. Converting the file therefore means digitizing the artwork into stitches, jumps, trims, and color changes; changing the filename or using a normal image converter is not sufficient.

What the PNG format is

PNG is a raster image format that stores colored pixels with lossless compression and optional transparency. Graphic designers, digitizers, websites, scanners, screenshots, and applications such as Adobe Photoshop, GIMP, Affinity Photo, and CorelDRAW commonly produce PNG files.

A PNG describes the visual appearance of artwork, not how an embroidery machine should sew it. It contains no stitch sequence, needle penetrations, density, underlay, pull compensation, object order, hoop position, trims, or machine commands. A larger or higher-resolution PNG does not supply this missing stitch information.

What the EXP format is

In machine embroidery, .exp usually means the Melco expanded embroidery format, used by compatible Melco and Amaya workflows and by embroidery applications that can import or export Melco EXP. It stores stitch and movement coordinates rather than pixels, making it a compact machine-delivery format when the destination specifically supports EXP.

EXP is an expanded stitch format, not a fully editable design project. It commonly does not retain the original artwork, digitizing objects, stitch settings, or dependable thread-color names. Color assignments, stops, trims, and other machine interpretations can vary between programs, so an imported EXP may require manual checking or reassignment.

How to convert the design

1. Prepare the PNG. Crop unused space, remove irrelevant backgrounds, simplify gradients and shadows, and separate the main color regions. Judge detail at the intended finished size; thin lines and small text that look clear on screen may not sew clearly.
2. Choose digitizing software. Hatch Embroidery, Wilcom EmbroideryStudio, and Embird provide manual digitizing and machine-file export. SewArt is suited to simpler assisted or automatic raster-to-embroidery work. Inkscape with the Ink/Stitch extension is a desktop option, but it requires tracing or constructing embroidery objects rather than saving the PNG directly as EXP.
3. Import the image as a reference. In Inkscape, use File → Import; other embroidery programs have an image-import command. Lower the reference opacity, lock it, and create sewing objects over the image. Do not trace anti-aliased pixels as if they were stitch paths.
4. Create and configure the objects. Use running stitches for fine lines, satin stitches for narrow columns and lettering, and fill stitches for larger regions. Set stitch direction, density, underlay, pull compensation, object order, trims, and jumps according to the fabric, stabilizer, thread, needle, and machine.
5. Set the hoop and final dimensions. Select the target hoop or sewing area, preserve the aspect ratio, and keep the design within its safe boundary. Set the final size before completing the digitizing. Resizing afterward can make satin columns too narrow, change density, and invalidate compensation settings.
6. Simulate the sewing sequence. Inspect starts and ends, jumps, trims, overlaps, gaps, tiny details, excessive density, and objects that sew in the wrong order. Correct the design rather than relying on the PNG preview to reveal these problems.
7. Export EXP. Use the program's machine-file export command, such as File → Export Machine File, and select EXP or Melco EXP. In Ink/Stitch, use its embroidery export or Extensions → Ink/Stitch → Embroider workflow and choose EXP. Menu names differ by software version. Save the output with an .exp extension.
8. Verify the destination file. Open the EXP in the machine's software, confirm the hoop, units, stitch count, thread order, color stops, trims, and start/end points, then run a test sew-out on the intended fabric before production.

For an automated attempt without installing software, use the built-in converter on 101convert.com: upload the PNG, select EXP, start the conversion, and download the resulting file. Automatic digitizing is most suitable for simple, high-contrast artwork; inspect the stitch preview and edit or redigitize the result when the software chooses unsuitable stitch types, density, or sequencing.

Quality and compatibility limits

Automatic conversion is unreliable for photographs, gradients, textured backgrounds, very small lettering, and thin outlines. Embroidery quality depends on stitch design and material settings, not only on PNG resolution. Excessive density can cause thread breaks, puckering, and fabric distortion; insufficient density can leave gaps or show the fabric through the design.

EXP compatibility is not universal. Confirm that the target supports the particular Melco EXP variant and has the required hoop size. Many Tajima-oriented workflows primarily use DST, while other machines use formats such as PES, JEF, or a vendor-specific format. If the machine does not accept EXP, export the format specified by its manual from the digitizing program and recheck the converted stitch sequence.

Keep the native digitizing project as the editable master and use EXP as the delivery file. Because EXP may lose color metadata and editable object information, verify thread assignments and color-change behavior in the destination software. A test stitch-out is needed to check registration, small-detail readability, density, and puckering on the actual fabric.