Free online BMP to DST converter

An embroidery machine or its design software may require a DST file when the supplied artwork is a BMP image. The conversion is a digitizing process that turns pixels into stitch objects; changing the extension or using a general image converter does not produce a sewable design.

What the BMP format is

BMP is a raster format that stores colored pixels, not embroidery objects, stitch paths, thread changes, or machine commands. Windows Paint, Adobe Photoshop, GIMP, CorelDRAW, and scanning software can create or export BMP files. Logos, scanned drawings, and prepared artwork are common BMP sources for embroidery digitizing.

BMP can contain monochrome, indexed-color, grayscale, or full-color images. Its pixel dimensions describe the source image, not the finished embroidery size. The digitizer must separately determine physical dimensions, hoop limits, stitch types, stitch direction, density, underlay, thread sequence, and fabric compensation.

What the DST format is

DST is a compact machine-embroidery stitch format developed for Tajima systems and supported by many commercial and home embroidery machines. It stores needle movements, stitches, jumps, color-change commands, and an end command rather than pixels or editable artwork.

DST is widely supported and transfers efficiently between digitizing software and machines, but it is not a vector image format. It generally does not retain the original BMP, editable object boundaries, stitch settings, reliable thread-brand information, or the full design structure from the source program. Trims may be inferred from jump sequences or handled according to the receiving machine's settings, so trim behavior must be checked on the target system.

How to convert BMP to DST

Ink/Stitch with Inkscape is a capable free desktop option. Hatch Embroidery Digitizer, Wilcom EmbroideryStudio, and SewArt provide commercial alternatives with different levels of automatic digitizing, object editing, lettering, and production control.

1. Prepare the BMP in an image editor. Remove unwanted background pixels, close gaps, simplify tiny details, separate regions by intended thread color, and record the required final width and height. Use the cleanest available source; enlarging a small bitmap does not restore missing detail.
2. Install Inkscape and Ink/Stitch, then import the image with File → Import. Use the BMP as a tracing reference or create vector paths with Path → Trace Bitmap. Inspect and simplify the result because automatic tracing commonly creates fragments, excessive nodes, and uneven outlines.
3. Turn each intended region into an embroidery object. Use fill stitches for broad areas, satin stitches for narrow columns with defined edges, and running stitches for outlines or fine details. A bitmap region does not automatically contain the information needed to select the correct stitch type.
4. Set the final physical dimensions and configure stitch density, maximum stitch length, stitch angle, underlay, pull compensation, object order, and thread colors. Place underlay before visible stitching and order objects to reduce unnecessary jumps, trims, and color changes.
5. Open the Ink/Stitch settings through Extensions → Ink/Stitch → Params. Use the preview and stitch simulator to inspect stitch count, gaps, excessive density, long jumps, needle penetrations, and color-change order.
6. Export through Extensions → Ink/Stitch → Embroider, select DST, and save a file such as logo_100mm.dst. Retain the editable SVG or native project file because DST is not a suitable format for substantial later editing.
7. Open the exported file in the machine's software. Confirm the hoop, physical dimensions, stitch count, color sequence, jump and trim behavior, and thread assignments before sewing a test on the intended fabric with the intended stabilizer.

A general online image converter such as a pixel-format conversion site can change BMP into another image format but cannot digitize it into stitches. An online embroidery digitizing service can accept BMP artwork and return DST, but select one that provides a stitch preview, dimensions, stitch count, revision terms, and a usable source or proofing process. Automatic results still require inspection and test stitching; send clean artwork and specify the machine, hoop, fabric, thread, and finished size.

Quality and compatibility limits

Clean, high-contrast artwork with limited colors is easier to digitize than a shaded photograph. Gradients, thin lines, isolated pixels, small text, and fine gaps often need enlargement, simplification, or redesign for the fabric and thread thickness.

Screen appearance does not predict sewn quality. Fabric stretch, stabilizer, needle, thread, machine tension, stitch direction, density, underlay, and pull compensation affect registration and coverage. Excessive density can cause thread breaks, puckering, bulky or stiff areas, and needle damage; insufficient density can expose the fabric or leave gaps.

DST color data is limited, and receiving software may map colors differently. Reassign the actual thread colors after opening the file. Some machines require a proprietary format, a particular hoop size, or machine-specific trim and stop settings, so the validated DST may need conversion and rechecking before production.