Category: Converters

File conversion guides — what actually happens to your file

Every conversion is a trade-off. You gain compatibility and lose transparency. You shrink file size and lose detail. You move from one format to another and the output silently changes dimensions, colour profile, or quality — and the tool that did it never told you. These guides explain the trade-offs so you stop discovering them after the file is already sent.

Most converter sites describe what their button does. These articles describe what happens to the bytes — why, when it matters, and what to check before you hit download.

What these guides cover

Format differences that change your output — HEIC stores 10-bit colour and depth maps. JPG stores 8-bit colour and nothing else. That is not a limitation of the converter — it is a limitation of the format. When you convert HEIC to JPG, the extra data is gone permanently. These guides tell you what each format carries, what it drops, and whether the loss matters for your use case.

Transparency and how converters break it — PNG and WebP carry an alpha channel. JPG does not. Every converter handles this differently: some flatten to white without telling you, some flatten to black, some add a checkerboard. The correct answer is to let you pick the background colour before conversion starts, and to warn you it is happening. Most tools skip both steps.

Quality settings and what they actually control — a quality slider at 80% does not mean 80% of the original. It means 80% of the maximum compression the codec allows, and the visual result depends on the image content, the resolution, and the format. A photo at 75% quality in WebP can look better than the same photo at 90% in JPG at half the file size. These guides explain what the slider moves and where the sweet spot sits for different use cases.

Batch conversion and where it fails — converting one file is easy. Converting 200 iPhone photos at once is where tools break. RAM spikes, tabs crash, progress bars freeze at 97%, and the ZIP download contains 194 files instead of 200 with no error message. The guides here cover what causes those failures and how to handle large batches without losing files.

File size surprises — converting JPG to PNG almost always makes the file larger, even though nothing looks better. Converting PNG to WebP almost always makes it smaller, even at lossless. The reason is how each codec represents pixel data, not how good the converter is. If your converted file is bigger than the original, it is usually the format choice, not a bug.

Formats we write about

HEIC / HEIF — the default camera format on every iPhone since iOS 11. Excellent compression, 10-bit colour, Live Photo support. The problem is that almost nothing outside Apple reads it natively. These guides cover bulk conversion to JPG, PNG, and WebP without losing metadata, crashing the browser, or flattening colour.

WebP — Google’s format that finally has universal browser support. Lossy and lossless modes, alpha channel, animation. Smaller than JPG at the same quality, smaller than PNG for lossless. The main gap is that professional print workflows still reject it.

AVIF — the next-generation format based on AV1 video compression. Better compression than WebP at the cost of slower encoding. Browser support is nearly universal in 2026, but CMS and design tool support still lags. These guides cover when AVIF is worth the trade-off and when WebP is the safer choice.

PNG — lossless, transparent, universally supported, and large. The right choice for screenshots, logos, UI elements, and anything where every pixel matters. The wrong choice for