Image Tools
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Local
Your images stay here

Processing happens in this browser. No upload, account or tracking.

Learn more

Convert to the format you need.

Choose JPEG, PNG, WebP or AVIF output without uploading the source image.

  1. Add images
  2. Adjust
  3. Download

Drop images here

or choose files from this device

JPG, PNG, WebP, AVIF · up to 10 files

✓Processed locally. Nothing is uploaded.

01Private by design

Your pixels stay in this tab.

02A real result

Weight, dimensions and format are verified.

03No detour

No account, queue or upload.

HOW IT WORKS

From image to download in three steps

  1. 1
    Add

    Choose one or more images.

  2. 2
    Adjust

    Adjust only the settings for this tool.

  3. 3
    Download

    Get the validated result.

Guide / EN

How it works

The conversion tool decodes the actual local pixels, then writes a new JPEG, PNG, WebP or AVIF file. Dimensions stay unchanged and no resize or target-size setting can enter this action.

Transparency is detected from decoded alpha pixels rather than inferred from a PNG extension. A JPEG background warning appears only when the source really contains transparent pixels.

01

Formats and settings

  • Choose one output format; the current input format is excluded from the generic conversion choices.
  • Lossy outputs expose quality, while WebP and AVIF can use their explicit lossless mode.
  • JPEG background confirmation is required only after real transparency has been detected.
02

A concrete example

A transparent WebP logo can be converted to PNG without a background. Choosing JPEG for that same file shows the detected-alpha warning and requires an explicit background confirmation.

03

Know before you start

  • Converting a lossy source cannot restore discarded detail.
  • PNG can be substantially larger than modern lossy formats.
  • Animated files remain outside the supported static-image contract.

FAQ / 03

Frequently asked questions

Does conversion resize my image?

No. The conversion draft has no dimension fields and the canonical builder preserves the original dimensions.

Why do I sometimes see a JPEG background?

It appears only when decoded pixels contain real transparency and JPEG is selected.

Are metadata copied?

No. Sparkpond Image Tools creates a controlled pixel re-encode and validates the new output.