Convert JPG to PNG online — lossless output
Re-encode a JPEG as PNG when a tool or template refuses JPEG input.
JPG → PNG converter
Runs entirely in this browser tab. Your file is never uploaded and nothing is stored.
JPGファイルをここにドロップ、またはクリックして選択
or — no sign-up required
このファイルの修正や作図に、CAD/BIM技術者が必要ですか？
Stuck on CAD or 3D file cleanup? Post a drafting role specifying the source format, target format and checks you need. Agree the scope before work starts.
手順
- 1Drop the JPG above.
- 2It is re-encoded losslessly as PNG.
- 3Download the result.
注意点
- Compression artefacts already in the JPEG stay — PNG cannot recover lost detail.
- Files usually get larger, not smaller.
JPG — JPEG image
Lossy raster image — smallest file for photos and renders.
PNG — Portable Network Graphics
Lossless raster image with transparency.
よくある質問
Does converting to PNG improve quality?
No. PNG preserves exactly what the JPEG contained; anything the JPEG discarded is gone for good.
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