Guides

Practical help for files, formats, and small displays

Choose a format, check a file, or prepare something for a small display. These guides explain what the tools change, how to check the result, and include sample files you can download and try yourself.

Images & SVG

5 guides

Choose formats, keep transparency, and check what an export changes.

PNG, JPG, or WebP
Compare image formats, preserve transparency, and inspect quality and size before saving.
SVG or a raster image
Keep vector artwork editable or export a raster copy with the right dimensions and background.
What an image's metadata can reveal
Inspect a generated photo sample, remove supported metadata, and check what remains in the saved image.
Why transparent images get a background
Compare transparent and opaque exports, choose a background, and check partially transparent edges.
What changes when an SVG becomes an image
Export a sample SVG at two sizes and check dimensions, viewBox, fonts, backgrounds, and external resources.

Audio

2 guides

Compare audio formats and make sense of volume, levels, and clipping.

MP3, WAV, or FLAC
Choose audio for sharing, editing, or archiving and check the settings Audio Converter actually uses.
Volume changes, normalization, and clipping
Compare gain and normalization with a generated tone and understand peak levels, RMS, and clipping.

GIFs & video

3 guides

Make files easier to share and get captions in time with your video.

Make a GIF smaller
Cut unnecessary frames, reduce dimensions, and compare motion and colors before sending a GIF.
Make a video small enough to send
Choose between trimming, resizing, and compression, then check the downloaded video in its destination.
Fixing subtitle timing before burning captions
Use a timed sample clip to correct an offset, check drift, and choose between separate subtitles and burned captions.

PDFs

1 guide

Understand scanned pages, searchable text, and PDF exports.

Scanned PDFs and text PDFs behave differently
Compare searchable text with an image-only page and see what PDF exports preserve or change.

Files & browsers

2 guides

Check downloads and work around browser processing limits.

Checking a download with a file checksum
Change one byte in a sample file, compare SHA-256 checksums, and distinguish matching bytes from a trusted source.
When a file is too large for a browser tool
Compare compressed file size with decoded memory and choose a practical workflow for large images and videos.

Pico Portal OS

2 guides

Prepare display graphics and capture screenshots over USB.

Preparing graphics for Pico Portal OS
Choose display dimensions, fit and dithering settings, and inspect an RGB565 asset before copying it to the Pico.
Taking a Pico Portal OS screenshot over USB
Check serial access, understand the capture formats, and account for the interruption and soft reset.