Feedback on the pixel, not in a paragraph.
“The button, third section, under the hero — no, the other one” becomes a pin on the button itself.
Click the email. That’s the annotation.
Comment mode turns the entire email into a canvas: click any element and your note pins to it — numbered, positioned, and impossible to misread. Pins carry through to every reviewer and every version.
- Pins anchor to the element, not just coordinates
- Numbered badges keep long reviews scannable
- Works identically for guests on share links
Threads that resolve, not scroll away.
Every annotation opens a thread: reply, @mention a teammate, set a status — open, in progress, in review, resolved — and filter the sidebar to what still needs work. Labels group feedback by type (copy, design, legal) across the whole canvas.
- Statuses + filters turn feedback into a worklist
- @mentions notify exactly the right person
- Reusable comment labels, personal or team-wide
Every version kept. Every change visible.
New exports land as new versions automatically. The cinematic compare wipes between any two versions in place — changed regions are highlighted in both — so “wait, what changed?” takes four seconds to answer.
- Automatic, deduplicated version history
- Scrubbable wipe + classic side-by-side
- Diff highlights on changed regions
Three clients, three dark modes, zero surprises.
Apple Mail respects your dark-mode CSS. Gmail and Outlook invert your colors by force. Proofel simulates each client’s real behavior with CIELAB color-space accuracy — images untouched, exactly like the inbox — so low-contrast text and ghosted logos surface during review.
- Per-client models: Apple Mail, Gmail, Outlook
- Honors @media (prefers-color-scheme: dark) rules
- One toggle, available to guests too
Feedback used to arrive as screenshots with arrows drawn on them. Now the client clicks the exact button they mean and I just… fix it. Review rounds went from days to hours.
Questions, answered
- Can reviewers comment without an account?
- Yes — guests open the share link, enter a display name, and can pin annotations, reply to threads, and resolve comments. No signup, no app install.
- How accurate is the dark-mode preview?
- Proofel models each client separately. Apple Mail honors your authored dark-mode CSS with gentle partial inversion; Gmail and Outlook force full color inversion. The simulation uses CIELAB color-space math, so the preview matches what those clients actually do to your colors.
- How do versions get created?
- Automatically. Forward a new export to the canvas address (or upload it) and it becomes the next version — identical content is deduplicated, and every version stays comparable.
Your next review could look like this.
Forward an email in, drop a pin, and watch the thread stay attached to the pixel.
Free plan · no credit card · reviewers never need an account