2 Ways to Make an Origami Heart Envelope (Instruction + Video)

A store-bought envelope just holds a love note. An origami heart envelope becomes part of the gift the moment it’s folded shut, no glue or tape holding the seal, just the paper locking into its own heart shape. This tutorial covers two ways to fold one.

Both start from craft paper and need nothing but a pencil, a ruler, and scissors to square up. The single-sheet version comes together in one continuous fold sequence, and the double-sheet version adds a small heart-shaped lock that tucks the whole envelope shut without a drop of glue.

If you’ve already folded our classic origami hearts, this envelope is the natural next step, same family of creases, just built out into something you can actually tuck a note inside. And if the heart shape isn’t the point and you just want a clean fold-and-seal paper envelope for any occasion, our other origami envelope folds skip the heart lock entirely.

Origami Heart Envelope at a Glance

• Difficulty: Beginner
• Time: 15 to 20 minutes per envelope
• Cost: Under $1
• Ages: 8+ (younger folders may need help with the smaller creases)
• Best for: Valentine’s Day notes, love letters, and small handmade gifts

What You Need to Fold an Origami Heart Envelope

Materials

• Two sheets of A4 craft paper in different colors, for the single-sheet method. Join two light or medium-light colored sheets together so each side of your fold shows a different color.
• Craft paper squares, 15cm x 15cm and 7cm x 7cm, for the double-sheet method with the heart lock.

Tools

• Pencil, to mark your fold lines and center points.
• Ruler, to measure your squares and press each crease sharp.
• Scissors, to cut your paper to size.

Once your paper’s cut to size, you’re ready to fold. If you want more paper crafts built around hearts and small gifts, our Origami Hearts & Gifts collection has plenty more to try.

Watch How to Fold an Origami Heart Envelope

The video walks through both the single-sheet fold and the double-sheet version with the heart lock, side by side with the photos below.

How to Fold an Origami Heart Envelope

Method 1: Single-Sheet Origami Heart Envelope

Step 1: Join Two Colors and Make the First Long Fold

Start with two sheets of A4 paper in different colors (we used white and pink) and join them together so you have one two-toned sheet. Fold it in half lengthwise with the darker color facing out, then set it down with the fold running through the middle.

Step 2: Fold Both Sides Out to Set Your Creases

Fold either side of the half-folded sheet outward in half, crease it well, then unfold. Repeat on the other side. You’re not keeping these folds, you’re only pressing in the creases you’ll line up against in the next step.

Step 3: Flip the Sheet and Fold In the Triangle Edges

Turn the paper over to the other side. Fold along the inner edges of the triangle section, then unfold those corner folds again. Fold the closed corners in and line them up with the nearest crease you already made in step 2.

Step 4: Open Each Side and Flatten the Triangles

Unfold the two corner folds from step 3. Keeping the side crease flat, gently open the left side of the pattern and press it flat along its diagonal creases so it forms a small triangle. Open and flatten the right side the same way.

Step 5: Fold the Right Side Along the Marked Lines

Open the folds on the right side back up. Line up the yellow dashed edges shown in the photo, fold the red dashed edge in to match, then flatten the right side again.

Note: the colored guide lines only mark which edges line up. Once the fold is flat, they won’t show on your finished envelope.

Step 6: Fold the Left Side to Match, Then Start Shaping the Heart

Fold the left side the same way you just folded the right. Now work with the top part of the pattern: fold the left flap in half so it lines up with the white section, then fold in its open corners and fold the top corner inward.

Step 7: Complete the Heart and Rotate the Pattern

Flatten the folded flap over to the opposite side. Fold the right flap the same way to finish the heart shape, then rotate the whole pattern so the heart sits at the top. Fold the two longer sides in along the nearest crease from the open side, then unfold just the left one again.

Step 8: Tuck In the Pockets to Close the Envelope

Fold the left side back in, this time tucking it inside the pocket at the top left. Unfold the right side, then fold it into the top right pocket the same way. Fold in the corners on the open end opposite the heart, fold the bottom edge up just below the heart’s middle point, then tuck the bottom half under the heart to seal the envelope shut.

Method 2: Double-Sheet Origami Heart Envelope With a Heart Lock

Step 1: Cut Your Two Squares and Crease the Envelope Base

For this version you need two square sheets: 15cm x 15cm for the envelope body and 7cm x 7cm for the heart lock. Start with the 15cm sheet. Fold it in half and unfold it, then fold one side of that half-crease in half again and unfold. These creases are your guides for the next step.

Step 2: Fold the Pocket and Square Off the Sides

Fold the quarter section along the side in half, then fold that same section along the middle crease, this becomes the envelope’s pocket. Fold its corners in, lining up the left side with the pocket’s top-open edge, then do the same on the right. Finally, fold the left side of the pattern vertically along the inner edge of the triangle at the bottom, and repeat on the right.

Step 3: Fold the Top Into a Triangle Flap

Mark the middle point of the top open edge. Fold the right half of that top edge down to the middle, then fold the left half the same way so they meet in a triangle. Fold that triangle flap along its bottom edge, then tuck the pointy tip inside the envelope’s pocket.

Step 4: Start the Heart Lock With the Small Square

Take the 7cm sheet and fold it in half both vertically and horizontally, unfolding after each one. Fold one side of the resulting half-creases in half. Flip the paper over, then fold the top half of that folded section along the crease on the other side.

Step 5: Shape the Point of the Heart Lock

Fold the remaining top half along the middle crease, then flip the paper over again. Fold the pointy end down to meet the middle point of the opposite side, then flip the paper over one more time.

Step 6: Round Out Both Sides of the Heart

Open and flatten the small top layer on the left. Fold in its left corner, then fold the top corner slightly inward, that’s the left lobe of the heart done. Mirror the same three folds on the right side.

Step 7: Lock the Heart Onto the Envelope

Fold the left and right open sides in along the middle crease, your heart lock is ready. Slide its square base into the envelope’s pocket, then tuck it all the way in until it holds itself shut. No glue needed, the fold does the locking.

Single-Sheet vs. Double-Sheet: Which Should You Fold?

Both make a real origami heart envelope, they just get there differently.

Tips for Folding an Origami Heart Envelope

• If a fold resists or won’t lie flat, don’t force it. Unfold back to the last step and make sure every crease lines up before trying again.
• Run your fingernail or the flat edge of a ruler along each crease. Sharp, precise folds make every later step easier and keep the finished heart shape crisp.
• Fold your first envelope from scrap paper. Once you’ve got the sequence down, cut your good paper to size and fold the one you’re actually giving away.
• Mix and match colors and patterns for each side of the sheet, or finish a sealed envelope with a small sticker or ribbon for extra polish.

Frequently Asked Questions

Do I need glue or tape to keep the envelope shut?

No. Both methods here lock shut using only the folds themselves, the single-sheet version tucks its final flap into a pocket, and the double-sheet version uses the small heart-shaped piece as a built-in clasp. That’s the whole point of an origami envelope: the fold does the sealing, so there’s nothing to peel open by accident either.

Can I use square paper instead of A4 for the single-sheet envelope?

You can, but you’ll get a squarer, more compact envelope instead of the elongated shape shown here, since the single-sheet method relies on A4’s proportions to form the heart correctly. If you want a square-paper version, the double-sheet method is the better fit, it’s built entirely from 15cm and 7cm squares from the start.

Can I make a bigger or smaller heart envelope?

Yes, just keep the two squares in the double-sheet method at the same 15:7 ratio (for example, 20cm and roughly 9cm) so the heart lock still fits the envelope’s pocket. Scaling the single-sheet version works the same way, keep an A4-style rectangle and start from a larger or smaller sheet cut to the same proportions.

Is an origami heart envelope safe to mail, or just for handing over in person?

It’s really made for handing over in person or tucking somewhere to be found. A few folds of paper won’t reliably survive a mail sorting machine, and postage on an odd, non-rectangular shape gets complicated fast. If you want to mail your note, slip the finished heart envelope inside a regular envelope instead of sending it loose.

More Origami Tutorials

• the full origami collection
• How to Make an Origami Shark
• 2 Ways of Making Jumping Origami Frogs

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