I built Grid34Sync because I was frustrated.
I spent an entire afternoon trying to plan my Instagram feed — dragging photos around in a spreadsheet, screenshotting my phone, uploading to three different apps, each with a paywall after five minutes. None of them showed me what my profile would actually look like. I'd plan everything, post the photos, open my profile, and it looked completely different from what I expected.
I'm not a developer. I'm someone who cares obsessively about how things look and decided the tools I needed didn't exist yet — so I built them. I worked with AI (primarily Claude and Codex) as my development partner, acting as product manager, designer, and QA throughout. Every feature in Grid34Sync started as something I personally needed.
In 2025, Instagram quietly switched its profile display from a 1:1 square crop to a taller 3:4 portrait format. No announcement. No notification. Suddenly, photos that had been carefully composed for a square grid were being displayed with a different crop. The apps I'd tried — even the ones charging $15 a month — still showed the old 1:1 preview. You were planning your feed with the wrong map.
Grid34Sync was the first tool I found (because I built it) that showed the 3:4 reality. That's not a marketing claim — it's baked into the name. Grid is the Instagram profile. 34 is the 3:4 format. Sync is seeing exactly what your followers will see before you post.
When I was building this, I had another constraint: I didn't want to upload my own design files to some server I didn't control. So from day one, every tool in Grid34Sync — the feed planner, the carousel splitter, the 9-grid maker — runs entirely in your browser. Nothing is uploaded. Nothing is stored remotely. Your photos never leave your device.
That turned out to matter to a lot more people than just me. If you're a social media manager or agency handling client work, you already know the problem: product launch photos, campaign visuals, brand assets that haven't gone live yet — you can't just upload those to a random third-party server. With Grid34Sync, there's no server to upload to. You can plan a client's entire content calendar, cut carousel tiles from unreleased product photos, or preview an influencer's grid before their campaign drops — with zero risk of files landing somewhere they shouldn't.
The core tools are completely free — no account, no sign-up, no time limit. Upload photos, preview your grid in 3:4, split a carousel, plan a 9-grid. All of it, free, in the browser.
PRO unlocks watermark-free exports and is a one-time purchase. Not a subscription. You pay once and it's yours.
Because I think good tools deserve honest context. Grid34Sync isn't built by a team of twenty. It's built by one person with a very specific frustration and a particular eye for how things should look. That's either reassuring or alarming — but either way, it's the truth.
If you've ever posted a photo and then immediately opened your profile and felt that quiet disappointment — Grid34Sync is for you.
Questions? Reach me at the contact page.