ファイル変換ブログ

Identify HEVC inside MP4, decide whether remuxing is enough, and compare measured H.264 quality and file-size tradeoffs before checking playback.

Extract the audio track from an MP4, choose an appropriate MP3 bitrate, and avoid silent, clipped, or mislabeled results.

Convert an iPhone HEIC photo for apps that require JPG, while avoiding common mistakes with quality, metadata, orientation, and originals.

Choose an audio format by the job it must do: editing, archiving, streaming, podcast delivery, or everyday playback.

A decision guide for document conversion: preserve layout, recover editable structure, extract plain text, and verify the result.

Turn a PDF into an editable Word document with realistic expectations for text PDFs, scans, tables, columns, fonts, and forms.

MP4 is a container, not a video codec. Learn how H.264, H.265, AV1, audio, resolution, and bitrate affect playback and conversion.

Convert EPUB to PDF for printing or fixed-page workflows, with checks for fonts, images, links, chapters, margins, and reflow.

Render an SVG to a sharp PNG by choosing output dimensions, checking fonts and external assets, and understanding transparency and scaling.

Compare MP4 and MOV by codec support, editing workflow, metadata, compatibility, and whether remuxing can avoid re-encoding.