About Image Tools
Image tools are the one area almost everyone reaches for at some point. A phone photo too heavy to send, an aspect ratio that does not fit a blog or Instagram, an email attachment over the size limit — it all gets solved here.
In Korea especially, the iPhone HEIC format often will not display in KakaoTalk or blogs, so converting to JPG is a constant need. JiniTools image tools never upload your file to a server — everything runs in your own browser.
Tools range from quick single-photo edits (compress, convert, resize, crop) to splitting one photo into a grid (Instagram grid art) or stitching several photos into one.
What people use it for
Shrink for chat and email attachments
Photos over 5 MB get rejected by some messengers and mail providers. Drop quality to 70-80% with the compressor and the file shrinks to a third or a fifth while looking nearly identical.
iPhone HEIC to JPG
HEIC, the iPhone default, breaks previews in many apps. The format converter accepts HEIC/HEIF (and even SVG) input and outputs JPG, PNG, WebP, or AVIF.
Match ratios for blog and social
Square (1:1), story (9:16), thumbnail (16:9) — every platform wants a different ratio. Resize and crop up front to avoid awkward cropping or blur after upload.
Instagram grid and photo stitching
Split one photo into a 3×3 grid that reads as a single image on your feed (grid-split mode in the crop tool), or stitch several photos vertically/horizontally into one (photo merge).
Which tool to pick
- Just reduce size Image compress. 70-80% quality recommended.
- Wrong format Image format converter (PNG/JPG/WebP/AVIF/HEIC/SVG).
- Wrong size or ratio Image resize (set pixels), image crop (drag to select).
- Grid split or stitch Grid-split mode in image crop, photo merge.
- Rotate or colors Image rotate/flip, image color extractor (key colors, HEX).
FAQ
How much should I lower quality?
For typical photos 70-80% is the sweet spot. Below 60%, block noise shows in smooth areas like sky and skin. Use 90%+ for print, 70-80% for web.
Which is smaller, PNG or JPG?
For photos, JPG is far smaller — a photo might be 5 MB as PNG but 800 KB as JPG. For transparent backgrounds or text/icons, PNG looks cleaner.
Does it convert iPhone HEIC?
Yes. The format converter accepts HEIC/HEIF and outputs JPG, PNG, WebP, or AVIF. SVG input is supported too.
What does browser-only processing mean?
Your file is never sent over the network. It is processed in browser memory and vanishes when you close the page. You can verify this in the Network tab of dev tools.
