blueimp/JavaScript-Canvas-to-Blob
JavaScript Canvas to Blob is a function to convert canvas elements into Blob objects. observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5318
- days_rel: n/a
- days_push: 1803
- n_releases_24m: 0
Adoption not part of the score
1470 stars · 385 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
A zero-dependency JavaScript polyfill for the standard HTMLCanvasElement.toBlob method, converting canvas elements into Blob objects. It enables canvas-to-Blob functionality in older browsers lacking native support.
Use cases
- convert canvas to blob for file uploads
- polyfill canvas.toBlob in older browsers
- create multipart form data from canvas images
- export canvas drawings as jpeg or png files
- save canvas content as an image file
When to choose
- you need to support legacy browsers without native toBlob support
- you want a tiny, zero-dependency canvas-to-Blob utility
- you're uploading canvas-generated images via FormData
When to avoid
- your target browsers all natively support HTMLCanvasElement.toBlob
- you need advanced image processing beyond canvas-to-Blob conversion
Facets
library · maturity maintenance
image-processing file-upload web-development frontend image-processing browser polyfill canvas blob zero-dependencies javascript
2 sources
- readme: https://github.com/blueimp/JavaScript-Canvas-to-Blob · fetched 2026-08-28 · ba36d2efa49e
- homepage: https://blueimp.github.io/JavaScript-Canvas-to-Blob/test/ · fetched 2026-08-29 · a2b2f03c3dc5
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| blueimp/JavaScript-Canvas-to-Blob | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="blueimp/JavaScript-Canvas-to-Blob")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem