Conversion guides

PNG is lossless and keeps transparency, which makes it the safe choice for logos, screenshots with text, and any artwork with hard edges. The trade-off is size: a photographic PNG is often five times larger than the same image as JPG.

JPG throws away detail your eye is unlikely to notice. At 90–95% quality the loss is invisible for photographs, and file size collapses. It has no alpha channel, so AllConverter asks which colour to flatten transparency onto before writing a JPG.

WebP sits in the middle: smaller than JPG at similar quality and it supports transparency. Every current browser reads it. AVIF compresses even harder — often 30% below WebP — at the cost of slower encoding and slightly narrower tool support.

Rule of thumb: photos on the web → WebP or AVIF; photos for print or email → JPG; graphics, UI and transparency → PNG.

The single largest saving on any image is dimension, not codec. A 6000px camera photo displayed in a 1200px column carries roughly 25 times the pixels it needs.

Use the resize control to cap the long edge at the size the image will actually be shown — 1920px for full-width hero images, 1280px for content images, 512px for avatars — and only then lower quality if the file is still too big.

CSV is a flat table. It cannot express nesting, so AllConverter flattens nested fields into dotted column names such as user.address.city. Spreadsheets and databases love it.

JSON keeps structure and types, which makes it the right hand-off for APIs and code. NDJSON — one JSON object per line — is the format to pick when a tool has to stream millions of records without loading them all.

YAML is JSON with better ergonomics for humans: configuration, pipelines, infrastructure. XML remains the language of enterprise exchange, legacy feeds and office document internals.

Converting a table to SQL inserts is handy when you need to seed a database quickly — set the table name and AllConverter quotes and escapes each value for you.

MP4 with H.264 plays essentially everywhere: phones, TVs, editors, messaging apps. WebM with VP8/VP9 or Opus audio is smaller for the same perceived quality and is ideal for self-hosted web video.

GIF is a 1987 image format pressed into service as video. A three-second clip that weighs 400 KB as MP4 can exceed 5 MB as GIF. Export GIF only where autoplaying video is impossible — some email clients and chat widgets — and keep it short, small and at 10–15 fps.

Extracting audio? Choose MP3 for universal compatibility, M4A/AAC for Apple ecosystems, Opus for the smallest files at speech bitrates, and WAV or FLAC when the audio will be edited further.

PDFs come in two flavours. Digitally generated files carry a real text layer, so extraction to TXT, Markdown or HTML is exact. Scanned documents are images of pages and hold no text at all.

If AllConverter reports that a PDF has no selectable text, convert its pages to PNG or JPG instead — that preserves the content faithfully, and each page is written as a numbered image, bundled into a ZIP when there is more than one.

A modern favicon is not one image. Browsers, bookmark bars, Windows shortcuts and pinned tiles each request different pixel sizes.

Export ICO with the full set — 16, 32, 48, 64, 128 and 256 — from a square source with generous padding. Fine detail disappears below 32px, so simplify the mark before converting rather than hoping the downscaler saves it.