How to use it
- Select a local image within the displayed limits.
- Choose output dimensions, quality and format.
- Download the processed copy after previewing its size.
Media & Files · Local-first · Beta
Photo Resizer & Compressor
Resize and compress a local image with explicit dimensions, quality, format and pixel limits.
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Trust record
Check the method before you rely on the result
- Method
- Decode a validated image locally, draw it to a bounded canvas and export the selected format.
- Output = bounded canvas draw(source image, width, height, quality, format)
- Effective period
- Formula-based; no statutory effective period
- Last verified
- 10 August 2026
- Review every 365 days
- Reviewer status
- Product and domain review: specialist approval not required
- Privacy
- Selected files are processed locally in this browser. Files and their contents are not uploaded, stored, put in URLs or sent to analytics.
Important limitations
- Browser codec support varies by format.
- Canvas export strips metadata; it does not guarantee a forensic wipe of every source property.
Browse Media & Files · Methodology · Sources
A quick guide
Use the number with context
The answer is only useful when you know what it includes and what it leaves out.
Formula
Output = bounded canvas draw(source image, width, height, quality, format)
The output is a new local copy; the source file is not changed.
Make it concrete
Worked example
A 3,000 × 2,000 image can be exported to a 1,200 × 800 JPEG copy locally.
Boundaries
What this tool does not assume
Limitations
- Browser codec support varies by format.
- Canvas export strips metadata; it does not guarantee a forensic wipe of every source property.
Edge cases
- Oversized or unsupported images are rejected before decode.
- Object URLs and image bitmaps are released after processing.
Last reviewed 10 August 2026 · Formula version 1.0
Method & sources
How this result is grounded
The formula is deterministic and runs in your browser. Read the reference below for the method used by this tool.
- Sharing and file utilities methodology v1
KarobarKit controlled methodology · authoritative reference · Checked 10 August 2026
Supports: payload escaping · file limits · safe decoded-content handling · local-only boundary
Questions
Frequently asked
Is the image uploaded?
No. The browser decodes and exports the image locally.
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Source register checked 10 August 2026.