Mosaic Crochet Pattern Generator
Convert a two-tone motif into a flat overlay mosaic crochet chart with marked drop stitches, alternating yarn colors and printable row instructions.
Mosaic Crochet Pattern · 20 × 20
Light = A. Dark = B. X = work a drop dc here. Colors preview the finished face; use the yarn named for the row.
Before row 1
Chain 21 in A. Work row 1 in the second chain and across. Fasten off after every row, leave tails, and start again at the right edge with the right side facing. Join new yarn with a standing single crochet at the first edge stitch.
This is flat overlay mosaic worked right to left on every row. Use one yarn per row. Work a single crochet through both loops at each edge. Inside, work single crochet in the back loop only (BLO sc), unless marked X. At X, work a US double crochet into the free front loop in the same column two rows below; skip the stitch immediately behind it. Each instruction uses one column.
Written rows
- ← Yarn A. sc × 20.
- ← Yarn B. sc × 1, BLO sc × 18, sc × 1.
- ← Yarn A. sc × 1, drop dc × 18, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 18, sc × 1.
- ← Yarn A. sc × 1, drop dc × 8, BLO sc × 2, drop dc × 8, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 8, drop dc × 2, BLO sc × 8, sc × 1.
- ← Yarn A. sc × 1, drop dc × 5, BLO sc × 8, drop dc × 5, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 5, drop dc × 8, BLO sc × 5, sc × 1.
- ← Yarn A. sc × 1, drop dc × 3, BLO sc × 12, drop dc × 3, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 3, drop dc × 12, BLO sc × 3, sc × 1.
- ← Yarn A. sc × 1, drop dc × 2, BLO sc × 14, drop dc × 2, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 2, drop dc × 14, BLO sc × 2, sc × 1.
- ← Yarn A. sc × 1, drop dc × 1, BLO sc × 16, drop dc × 1, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 1, drop dc × 16, BLO sc × 1, sc × 1.
- ← Yarn A. sc × 1, BLO sc × 18, sc × 1.
- ← Yarn B. sc × 1, drop dc × 18, sc × 1.
- ← Yarn A. sc × 1, BLO sc × 18, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 1, drop dc × 16, BLO sc × 1, sc × 1.
- ← Yarn A. sc × 1, drop dc × 1, BLO sc × 16, drop dc × 1, sc × 1.
- ← Yarn B. sc × 1, BLO sc × 2, drop dc × 6, BLO sc × 2, drop dc × 6, BLO sc × 2, sc × 1.
Choosing your motif
The first two rows establish the alternating colors. The generator places straight drops inside the two edge stitches and avoids adjacent drops in the same column on consecutive rows. Expect fine details to become steps or stripes. Read the X marks on their own row, even though the tall stitch covers part of the row below.
How to read the chart
The mosaic crochet pattern generator builds a flat overlay design with one working yarn in each row. Row one uses A, row two uses B, then the colors alternate. Work from the right edge with the front facing you each time. Fasten off at the end of every row and attach the next yarn back at the right edge. Both colors need that same starting edge, which explains the fringe of tails along either side.
A back-loop single crochet leaves a front loop available for a later row. An X tells you to reach two rows down and work a double crochet into that front loop in the same column. Skip the underlying stitch immediately behind the tall stitch. Its front now shows your current yarn, even though the covered row was worked with the other yarn. The mosaic crochet pattern generator shows the finished colors and places the instruction mark on the row where you actually make the stitch.
Measure your gauge and plan the finished size
Work a sample containing both plain columns and several drops. Measure across the settled fabric, away from the edge stitches and tails. Suppose sixteen columns and twenty rows measure 10 cm in their respective directions. A twenty-column, twenty-row chart would then be about 12.5 cm wide and 10 cm high. Treat those numbers as an example calculation and measure your own yarn. A sample made only in ordinary single crochet can give a different result.
For a panel 25 cm wide at the example gauge, set forty columns in the mosaic crochet pattern generator. The outer columns serve as edges, leaving thirty-eight interior positions for the motif. Look at the preview from a little distance. A one-cell diagonal may come out as alternating steps because only one working color is available on a given row. Make a swatch of a characteristic corner before planning a broad border or a second matching piece.
Common mistakes to check on your swatch
- Turning the piece at the end of the row puts the next stitches on the back. Leave a marker on the front and return to the same starting edge every time you attach yarn.
- Working a drop and also filling the stitch behind it adds a column. Count one column for the completed drop. Use the untouched edge stitches as landmarks when checking the width at the end.
- Copying an X straight down onto the adjacent row in the same column breaks this generator’s placement rule. Read the actual X marks on the current row, rather than guessing the stitches from the finished colors.
- Pulling a drop tightly across the row below puckers the panel. Draw the loop up to the height of the working row and compare a short group of drops with the neighboring plain stitches.
Questions before you start crocheting
Is this overlay or inset mosaic?
The mosaic crochet pattern generator uses flat overlay mosaic. Inset patterns usually work the colors in paired rows with a different chain-space structure. Follow the written overlay instructions for this chart, including its edge stitches and fastening off.
Can I use fine yarn?
Yes. Try two contrasting yarns that feel similar in thickness. Fine yarn can make a compact motif, but a difference of only one column may be hard to see. Measure a worked sample in the light where the piece will be used.
How much yarn will a 20 × 20 motif need?
Count the rows of each color, then measure consumption on a small sample that includes drops. Allow separately for the tails on both sides of every row. Scaling only the face area underestimates yarn when a small panel has long fringe.
Why are the first two rows plain?
A drop needs a front loop two rows below. The first rows establish that fabric. Keep the starting rows and both side edges when counting positions, even where the photograph has a dark mark near an edge.
What if my photograph loses its lettering?
Try a simpler letterform and a wider grid. Leave room around enclosed spaces in letters such as P and R. Use the finished preview to judge whether they still read clearly before printing the written rows.
How do I keep the chart and instructions together?
Use Print chart / Save PDF. On the paper copy, mark the yarn for each row and tick off the row after fastening off. Download the SVG as well if you prefer to enlarge the X marks on a screen.