25 FREE TOOLS · NO SIGNUP · RUNS IN YOUR BROWSER
Measure, check and calculate everything Instagram before you hit post.
Character counters, size checkers, engagement calculators and more — one toolkit, built and kept free by Grohubz.
Browse all 25 toolsText & Captions
Caption Character CounterCount characters, words and hashtags in your Instagram caption before you post, with a live view of the 125-character cut-off.Open tool →Bio Character CounterCheck your Instagram bio against the 150-character limit in real time, with a breakdown of lines and emoji.Open tool →Hashtag CounterCount and list every hashtag in your caption or comment, and check it against Instagram's 30-hashtag limit.Open tool →Invisible Character GeneratorGenerate invisible / blank characters to create empty lines in your Instagram bio, captions and comments.Open tool →Line Break GeneratorFormat multi-line captions and bios so line breaks survive when pasted into Instagram.Open tool →
Sizes & Dimensions
Reel Size CheckerCheck whether your video file matches Instagram's recommended 1080×1920 Reel resolution before you upload.Open tool →Reel Safe Zone CheckerOverlay Instagram's Reel UI safe zone on your cover or frame so captions, profile info and buttons never cover your subject.Open tool →Reel Cover Size CheckerCheck a custom Reel cover image against Instagram's recommended dimensions and crop before you upload it.Open tool →Story Size CheckerVerify your Story image or video matches Instagram's 1080×1920 full-screen format before posting.Open tool →Post Size CheckerCheck your feed post image against Instagram's square, portrait and landscape size recommendations.Open tool →Carousel Size CheckerMake sure every slide in your Instagram carousel shares the same aspect ratio before you upload.Open tool →Aspect Ratio CalculatorCalculate the exact width or height needed to hit a target Instagram aspect ratio like 1:1, 4:5 or 9:16.Open tool →Crop CalculatorWork out exactly how much of your original photo Instagram will crop away for a given target ratio.Open tool →Image CompressorCompress photos in your browser to Instagram-friendly file sizes without a visible drop in quality.Open tool →
Growth & Money
Engagement Rate CalculatorCalculate your Instagram post engagement rate from likes, comments, saves and shares against your follower count.Open tool →Reel Engagement CalculatorCalculate Reel-specific engagement rate using plays instead of followers, the metric brands actually ask for.Open tool →Follower Growth CalculatorCalculate your follower growth rate over any period, in both raw numbers and percentage terms.Open tool →Posting Frequency CalculatorTurn a weekly posting goal into a concrete monthly post count and the exact number of days between posts.Open tool →Influencer Rate CalculatorGet a starting-point estimate for what to charge (or pay) for an Instagram post, Story or Reel based on followers and engagement.Open tool →Sponsored Post CalculatorEstimate the media value of a sponsored Instagram post from follower count, engagement rate and a target CPM.Open tool →
Preview & Generate
Media Kit GeneratorTurn your Instagram stats into a clean, copy-ready media kit summary for brand outreach.Open tool →Bio PreviewerPreview how your bio, name and profile picture will actually look on an Instagram profile before you publish changes.Open tool →Carousel PreviewerPreview your carousel slides in order, with swipe navigation, before you upload the post.Open tool →Profile QR Code GeneratorGenerate a scannable QR code that opens your Instagram profile directly, ready for print or stories.Open tool →Reel QR Code GeneratorGenerate a scannable QR code that opens a specific Instagram Reel directly, ideal for cross-promotion.Open tool →
FREE TOOL BY GROHUBZ
Want the strategy to match the specs? Grohubz helps you plan, schedule and grow on Instagram — not just measure it.