Upload your photo and let AI analyse the mood, lighting and subject to craft the perfect Instagram caption with smart hashtags.
From your history
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2 hours ago
Your generated captions will appear here.
Your key is stored only in this browser and sent directly to Google's API. Get one free from the Gemini API docs. New here? .
Used across every caption you generate and in the preview.
Move your caption history and brand settings to another browser or device. Your API key is never included in the export.
InstaCaption uses your own Google Gemini key, so you are never queuing behind anyone else and you control the spend. Get one free from the Gemini API docs, then paste it into Settings > API Key. The key is checked before it is saved.
Your key is stored in this browser only and sent straight to Google. It never reaches any server of ours, because there is no server. Tick Remember on this device to keep it after you close the tab, or leave it unticked on a shared computer and it is forgotten when the tab closes.
Drag a photo onto the drop area, or click to browse. JPG, PNG and WEBP, up to 10MB each.
Add up to 10 photos and they become one carousel post. Every slide is sent together, so the caption covers the whole set rather than just the cover.
Slide 1 is the cover. Use the arrows on a thumbnail to reorder, and the cross to remove one. Everything here works from the keyboard too.
Pick a tone, a length and how many emoji you want. Context is the most useful field here: anything the photo cannot show, such as the occasion, the place or what you were wearing.
Model, MUA, stylist, photographer and location. Filled fields are formatted into the caption as a credits block; empty ones are skipped entirely.
Ask for 1, 2 or 3 and they arrive as options you can flick between. All of them come from a single request, so three costs far less than three times one, and the first one streams in as it is written.
Choose how many tags you want, and which language to write in. Your own tags and your signature are always added, whatever the model suggests.
Settings > Brand holds your handle, a signature hashtag added to every caption, and the photographer credit used whenever you leave that field blank.
Click the caption in the phone preview to change any word before you post. Your edit is saved back into history.
Under the caption you get a live count against Instagram's ceilings of 2,200 characters and 30 hashtags, in red if you go over. Text after the first 125 characters is dimmed: that is the part hidden behind "more".
Copy Caption puts it on the clipboard. On a phone, Share sends the photos and the caption to Instagram through the share sheet in one step.
Open it from the bar along the bottom. Every caption is kept with its cover thumbnail. Preview reads one back, Reuse drops its settings into the form for a new photo.
Settings > Data saves your history and brand profile to a file you can load on another device. Your API key is never included in it.
Once you generate, a chip appears in the header with the tokens used this visit and an estimate in dollars. Click it for a breakdown. A free-tier key is not billed at all.
Add InstaCaption to your home screen and it runs like an app, works offline for reading past captions, and shows up when you share photos from your gallery. On iPhone use Share, then Add to Home Screen.