Image to Crochet Pattern

Stitchgrid (imagetocrochetpattern.com) converts a photo into a lettered, editable crochet stitch chart — choose how many stitches go across (16-120) and how many yarn colours to use (2-12), and it charts the image square by square, ready to print as a PNG sheet or one-page PDF. The entire conversion runs locally in the browser: the picture is decoded in that browser tab, and once the page has loaded, the app makes no network requests, so nothing is uploaded or stored on a server.

Paragraph 2: The charting itself uses median-cut colour quantization (repeatedly splitting the colour space along its widest range until it reaches your chosen colour count) — a deterministic method, meaning the same picture and colour count always produce the same palette, not a randomized approximation. An optional “AI chart draft” step lets you describe what the chart should emphasize in plain language; the tool is explicit that this step only suggests direction and does not create the chart, calculate gauge, or claim the finished pattern is accurate — that work stays with the deterministic charting engine and the user’s own corrections.

Paragraph 3: Every square in the generated chart can be manually repainted, and yarn-colour labels can be swapped to match real yarn on hand. The tool is upfront about what it doesn’t do: gauge isn’t converted (since one square is one stitch, not necessarily square in real tension), palette colours are plain descriptions with no commercial yarn-brand mapping, and nothing is saved between visits — closing the tab clears the chart.

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Key Features

• 📷 Photo-to-Chart Conversion — Converts a JPEG, PNG, or WebP (up to 25MB) into a lettered crochet stitch chart
• 🎛️ Adjustable Stitch Count — 16 to 120 stitches across, with rows following the picture’s proportions
• 🎨 Adjustable Colour Count — 2 to 12 yarn colours, chosen by deterministic median-cut quantization
• ✏️ Manual Correction — Repaint any square by hand or swap a palette colour for real yarn you own
• 🤖 Optional AI Chart Draft — Describe what the chart should emphasize; suggests direction only, doesn’t generate the chart itself
• 🖨️ PNG or PDF Export — Save a print-ready PNG sheet or a one-page PDF including the grid and lettered legend
• 🔒 Fully Local Processing — No account, no automatic upload; the optional AI request sends only an explicitly-opted-in reduced preview
• 📏 Legend-Based Reading — Letters match a legend so the chart still reads correctly even printed in grayscale

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Who Should Use This?

• Crocheters who want to convert a personal photo (pet, portrait, logo) into a graphable stitch pattern
• Crafters who want full manual control over the final chart rather than a fully automated, uneditable output
• Privacy-conscious users who want image processing to happen entirely on their own device
• Anyone comfortable checking their own gauge swatch rather than expecting the tool to guarantee finished size

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Pros and Cons

Pros

• Genuinely private by design — no account, no automatic upload, verifiable claim rather than just marketing language
• Deterministic colour quantization means predictable, repeatable results rather than a “roll the dice” generator
• Full manual editing (repaint any square, remap yarn colours) rather than a locked, take-it-or-leave-it output
• Transparent, specific documentation of what the tool does not do (gauge, yarn-brand mapping, undo scope) — unusually honest for a free web tool
• Free to use with print-ready PNG/PDF export included, no paywall visible on the page

Cons

• Minimal actual AI involvement — the core conversion is deterministic image processing, not AI; the one AI feature (chart draft) explicitly doesn’t create or validate the chart, so buyers expecting AI-driven pattern generation should understand the real scope before using it
• Gauge is not converted — one square is one stitch, but stitches are rarely perfectly square in real tension, so finished size must be verified with your own swatch, not assumed from the chart
• No yarn-brand colour matching — palette colours are plain descriptions, not mapped to any commercial yarn colour standard
• Nothing saves between visits — closing the tab clears the chart, so finish and export in one session or start over
• Undo only covers square edits, not palette changes or chart rebuilds

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FAQ

Does my photo leave this page?

No, by default. The picture is decoded and charted in the browser tab, with no automatic upload. Only if you enable the optional image-preview checkbox and use “Prepare AI draft” is a reduced 512px JPEG preview sent for that one request — the original image and generated chart remain local either way.

What pictures can I use?

JPEG, PNG, or WebP files up to 25MB. Use a picture you own or are licensed to use. Large photos are scaled down in the tab before charting.

Does this map yarn to a commercial colour standard?

No. Palette colours are plain descriptions, with no yarn-brand mapping and no claim of compatibility with any commercial colour standard.

Can I print the chart?

Yes. Save a PNG sheet or a one-page PDF including the grid and a lettered legend. Gauge is not converted, so check your own swatch before trusting the finished size.

How many stitches and colours can I use?

Stitches across run from 16 to 120. Yarn colours run from 2 to 12. Rows follow the picture’s proportions and are capped at 220.

How do I read the chart?

One square is one stitch. Heavier lines mark every ten stitches. Letters match the legend, so a grayscale print still reads correctly. Gauge is not converted, so check your own swatch before trusting finished size.

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How We Rated It

Criteria	Rating
Accuracy & Reliability	⭐4.4/5
Ease of Use	⭐ 4.3/5
Features & Functionality	⭐ 3.6/5
Performance	⭐ 4.5/5
Customization	⭐ 4.2/5
Security & Privacy	⭐ 4.9/5
Customer Support	⭐ 3.2/5
Value for Money	⭐ 4.7/5
Integrations	⭐ 2.8/5