This roundup includes more than 10 free filet crochet blanket patterns.
Filet crochet is an easy-to-crochet technique which uses double crochet stitches and chain stitches.
The charts that often accompany filet crochet patterns are very easy to understand because they only contain the 2 types of stitches. The stitches are often referred to as blocks, the blocks being 4 dc (for a solid section) or 1 dc, ch 2, (skip 2), 1 dc, for the open block.
The only tricky bit, which isn’t really tricky at all, is that blocks share bordered stitches.
So if you have a solid filled-in block, and then an open block, the solid block represents 4 dc, and the open block represents 1 dc, ch 2 (skip 2), 1 dc.
It would be worked as 1 dc, 1 dc, 1 dc, 1 dc, ch 2 (sk 2), 1 dc; where the 1 dc is shared between the 2 blocks.
For a more detailed look at Filet Crochet and a small practice project, please visit this post from the Red Heart Blog: Ultimate Guide to Filet Crochet
Free Filet Crochet Blanket Patterns
You may also enjoy these free blanket patterns:
The Flower Garden Afghan by Mary Jane Protus at Red Heart Yarn is stunning. This is a romantic, vintage style project you can crochet with medium weight yarn  and both a 5.5 mm (I) and a 6 mm (J) hooksRead More
The Little Boy Blue Blanket by Mary Jane Protus at Red Heart Yarn measures 44 inches by 45 inches. You will need DK weight yarn  and a 4 mm (G) hook to make this project.Read More
The Spiders and Cobwebs Throw by Shari White at Red Heart Yarn is a lovely lightweight and vintage style design. The finished throw measures 35 inches by 40 inches and is crocheted with medium weight yarn  and a 5 mm (H) hook.Read More
The Granny Filet Square Afghan by Maria's Blue Crayon is crocheted with medium weight yarn  and a 5 mm (H) hook. The pattern can be made as large (or small) as you want and is based on a 5 row repeat.Read More
The Triangles & Stripes Baby Blanket by Erica Dietz makes a beautiful baby blanket. You will need medium weight yarn  and a 6 mm (J) hook. The finished blanket measures 30 inches by 33 inches but is easily made bigger or smaller.Read More
The Checkered Filet Blanket by Erangi Udeshika measures 30 inches by 33 inches and can be easily adjusted to any size. You will need medium weight yarn  and a 5.5 mm (I) hook to make this project.Read More
The Ribbon Cake Blanket by Erangi Udeshika is an easy filet crochet design. Choose a solid color of yarn, or multicolor yarn for this project. The finished blanket measures 28 inches by 28 inches and is crocheted in DK weight yarn with a 5 mm (H) hook.Read More
The Midwife Blanket pattern by Rebecca Langford is based on one of the gorgeous baby blankets shown in the show "Call the Midwife"Read More
The Hopscotch Blanket by Tanya Eberhardt is perfect for the nursery. The finished baby blanket measures 30 inches by 35 inches in size when crocheted with DK weight yarn  and a 3.5 mm (E) hook.Read More
The Fisherman Star Afghan by the Caron Design Team has a pretty fringed edge. The blanket measures 54 inches by 78 inches and is crocheted with medium weight yarn  and a 4 mm (G) hook. This has also been called the National Star Afghan.Read More
The Wedding Ring Filet Afghan by Lesley Pridgen will make a lovely gift. The finished afghan measures 49 inches by 66 inches and was crocheted in medium weight yarn  with a 6 mm (J) crochet hook.Read More
The Mini Filet Police Box Blanket by Sandra Petit measures 26 inches by 31 inches in size. You will need medium weight yarn  and a 5.5 mm (I) hook. The chart is provided as an image on Ravelry.Read More