JPG vs PNG vs WebP: which format should you use?
Lossy or lossless, transparency or not, and the one question that settles it.
Read the guideGuides
Guides
15 guides on the questions that come up around the tools — which format to save in, what a quality slider really changes, whether a file is big enough to print, and what makes a keyword worth having.
Formats and colour4
Which file format to save in, what the differences actually cost you, and how colour behaves between screen and print.
WebP vs AVIF
AVIF compresses harder. WebP is easier to actually produce.
Read the guideRGB vs CMYK
Screens add light, ink subtracts it — and the gamuts do not match.
Read the guideBuilding a colour palette from an image (and checking its contrast)
Extracting swatches, then checking they are legible to set type in.
Read the guideSize and compression4
Making files smaller without wrecking them — quality settings, dimensions, and hitting a hard upload limit.
How image compression works
What the quality slider changes, and why re-saving costs you twice.
Read the guideHow to compress images without losing too much quality
Where the free savings end and the visible damage starts.
Read the guideHow to reduce image file size to fit an upload limit
Four levers, in the order that costs you the least.
Read the guideHow to optimise images for websites
Dimensions, format, compression, and the HTML around the image.
Read the guideResolution and print4
DPI, pixel dimensions and aspect ratios: what each one controls, and which of them a printer actually reads.
Image resolution explained
Three numbers, one of which the file does not actually contain.
Read the guideWhat does 300 DPI mean?
A ratio, not a quality setting — and changing it adds no detail.
Read the guideHow to resize images correctly
Three predictable failures, and how to sidestep all of them.
Read the guideUnderstanding aspect ratios
Why cropping and resizing are not the same operation.
Read the guideStock and AI workflow3
Metadata that passes review, keywords worth having, and prompts that behave the same way twice.
Writing stock titles and keywords that hold up
What a title is for, and which keywords are worse than none.
Read the guideImage metadata explained
EXIF, IPTC, XMP — what each holds and what quietly strips it.
Read the guideHow to write AI image prompts that behave the same way twice
A structure that survives contact with an actual model.
Read the guideEvery guide points at a tool that does the job
Converting, compressing, resizing, cropping and DPI all run in your own browser — no upload, no account, no limits.
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