How to annotate a JPEG
To annotate a JPEG, open it in Preview on Mac (Shift ⌘ A for the markup toolbar), Paint or Snipping Tool on Windows, or the built-in Markup tool on iPhone. Add arrows, text boxes, or shapes, then save. One thing to know: JPEGs re-compress on every save, so annotations baked into the file degrade the image over time. To collect feedback from a client, a shareable link beats emailing the file — notes pin to the exact spot and the original stays untouched.
On Mac with Preview
Open the JPEG in Preview (double-click the file — it opens in Preview by default on macOS). Press Shift ⌘ A to reveal the Markup Toolbar. You get arrows, shapes, a text tool, a magnifier loupe, and a highlight pen. Click the spot you want to call out, pick a tool, and add your annotation. One JPEG-specific gotcha: when you save with ⌘ S, Preview re-encodes the JPEG at its original quality setting. But if you've resaved it several times or opened it in another app first, the file may already be at a degraded quality level — each re-encode compounds the loss. If image fidelity matters, annotate a copy rather than the original, or export to PNG before adding notes (File → Export → PNG). That way the markup is baked into a lossless file and your original JPEG stays clean.
On Windows with Paint or Snipping Tool
Open the JPEG in Paint (right-click the file → Open with → Paint). Use the Shapes tool to draw rectangles and arrows, and the Text tool to add labels — click the spot you want, drag a text box, and type. Pick a high-contrast color (red or yellow) so annotations read over the photo. Save as PNG if you can: Paint defaults to JPEG, which recompresses on every save and slowly degrades fine detail. If you need to keep it as a JPEG, set quality to 100% in the save dialog. For a quick annotated screenshot of a JPEG on-screen, Windows + Shift + S opens Snipping Tool — capture, draw on it, and save without touching the original file at all.
On iPhone or iPad with Markup
Open the JPEG in the Photos app, tap Edit, then tap the pencil icon in the top-right corner to enter Markup mode. You get a pen, highlighter, shapes, and a text tool — tap the + to add a text label. Draw an arrow to the area you mean, type your note, then tap Done → Done to save. iOS Markup saves the annotated version as a new file and keeps the original intact, which sidesteps the re-compression problem. The one limit: Markup on iOS doesn't have a numbered call-out tool — if you need sequential numbered pins ("1. crop here, 2. change this color") a browser-based tool or Canva handles that better.
With a free online tool (no install, any platform)
Browser-based annotators like Annotely or Canva let you drag in a JPEG, add arrows, text boxes, blurred sections, or numbered pins, then download the result. No account required for basic use. Upload, annotate, download — done in under a minute. The tradeoff: the output is a flat image with your annotations baked in. If your client needs to respond to specific annotations, they can't — they'll write back in an email and say "which arrow near the top?" and you're back to guessing. For a one-way markup (your notes to yourself, or a quick callout to a colleague), this works fine.
When a client needs to annotate it back
The designer→client feedback loop breaks down with JPEGs almost immediately. You email the image, your client opens it in Photos or Preview, draws their feedback in freehand, exports a new JPEG — which is now third-generation and notably blurrier — and emails it back. By round two, the red circle is 12 pixels wide and "the bit near the top" could be three different things. The cleaner approach: share a link they can click and annotate in their browser, with their notes pinned to the exact pixel they mean. No file bouncing, no re-compressed versions, no 'which one did you mean' follow-up. Every comment lands in one place on the original.
If the goal is collecting your client's feedback on a JPEG — not marking it up yourself — skip the export loop. Drop the JPEG into Drafty, share the link, and your client clicks the exact spot they mean and pins a note right there. No file download, no account, no re-compressed reply image. You see their comment anchored to the element they meant, reply in the thread, and share a revised version on the same link. The three-email back-and-forth becomes one URL.
Open a live demoQuestions
- How do I annotate a JPEG on a Mac for free?
- Open the JPEG in Preview (the macOS default), then press Shift ⌘ A to show the Markup Toolbar. Add arrows, shapes, and text — all free, nothing to install. To avoid re-compressing the image, export a copy to PNG (File → Export → PNG) before saving your annotations.
- Does annotating a JPEG reduce the image quality?
- It can. When you save annotations flattened into a JPEG, most tools re-encode the file and lose a small amount of quality each time. If image fidelity matters, annotate a copy rather than the original, or work on a PNG export — PNG is lossless, so saving annotations doesn't degrade the image.
- How do I annotate a JPEG on Windows for free?
- Open the image in Paint (right-click → Open with → Paint) and use the Shapes and Text tools. To avoid quality loss, save the annotated version as PNG instead of JPEG. For a screenshot of the annotated image, Windows + Shift + S captures it without touching the original file.
- How do I annotate a JPEG on my iPhone?
- Open the photo in the Photos app, tap Edit, then tap the pencil icon to enter Markup mode. Add arrows, text, and shapes, then tap Done twice. iOS saves an annotated copy and keeps the original untouched — no quality loss.
- How do I share a JPEG with a client so they can annotate it without downloading anything?
- Share it as a browser-based review link rather than a file. Your client opens the URL, clicks the exact spot they mean, and leaves a note pinned there — no account, no download. The notes land in one place instead of scattered across re-emailed image files.
- What is the best free tool to annotate a JPEG online?
- For a quick one-way markup (you annotate, they view), browser tools like Annotely or Canva work with no account required — upload, add arrows and text, download. If you also need the client to annotate back and have their notes linked to the exact spot, a collaborative review tool is more practical than emailing JPEG files back and forth.
Keep exploring
Stop emailing files back and forth.
Share one link. They comment on the exact spot — no account, always the current version.