Twelve free Instagram tools, grouped by the job they do: work out what your account is worth, write text that survives Instagram’s formatting, and get your pixels right before you post. All twelve run entirely in this browser tab — no sign-in, no password, no upload, no server-side processing of anything you enter.
Which tool do you actually need?
Most people arrive with one of about six problems. Start here rather than reading all twelve descriptions.
| If your problem is… | Start with | Then |
|---|---|---|
| “A brand asked my rate and I have no idea what to say” | Engagement Rate Calculator | Influencer Rate Calculator |
| “My reach dropped and I don’t know why” | Engagement Rate Calculator (reach mode) | Best Time to Post |
| “My photo got cropped badly” | Image & Video Size Checker | Safe Zone Checker |
| “My caption cuts off mid-sentence” | Caption Length Counter | Hashtag Set Builder |
| “My bio looks like one long blob” | Bio Line Break Generator | Font Generator |
| “I want my next nine posts to look deliberate” | Grid Planner | Carousel Splitter |
Measure & price
These four turn raw numbers — followers, likes, reach, growth — into figures you can defend in a conversation with a brand. Each one shows the multipliers it applies, so you can disagree with a benchmark and adjust it rather than accepting an answer from a black box. That matters more than it sounds: most rate calculators online produce a number with no working shown, which makes it useless the moment a brand pushes back.
Engagement Rate Calculator
Work out your real engagement rate by followers or by reach, and see how it sits against the benchmark for your follower tier.
Influencer Rate Calculator
Turn followers, engagement and usage rights into a defensible price range you can take into a brand negotiation.
Follower Growth Calculator
Project how long your current growth rate takes to reach a target, under both linear and compounding maths.
Best Time to Post Calculator
Convert your audience’s active hours across up to three time zones into a heatmap in your own local time.
The natural order is engagement rate first, then pricing. Your engagement rate is the input a brand actually checks, and it is the single largest multiplier in any rate model — so knowing it before you quote is the difference between a number you can justify and a number you guessed.
Write & format
Instagram’s text handling has quirks that quietly cost people engagement every day: line breaks vanish from the bio field, captions truncate at 125 characters mid-sentence, Unicode “fonts” break screen readers, and thirty identical mega-hashtags do approximately nothing. These four deal with the quirks directly rather than pretending they aren’t there.
Instagram Font Generator
Eighteen Unicode text styles you can paste into a bio or caption, with an honest note about which ones break screen readers.
Bio Line Break Generator
Instagram eats ordinary line breaks in the bio field. This puts them back, with a live 150-character counter and preview.
Caption Length Counter
Characters, hashtags, mentions and the 125-character “… more” cut-off, all counted live with a feed preview.
Hashtag Set Builder
Build a balanced set from a curated niche dataset, mixing broad and specific tags instead of stacking 30 mega tags.
One honest note on the font generator: those styles are not fonts. Instagram has exactly one typeface. What you are pasting in are different Unicode characters — mathematical symbols that happen to look like letters. They work, they are eye-catching, and they make your profile difficult or impossible for a screen reader user to read. The tool says so on every affected style, and tells you how the result will be announced.
Size & design
Getting cropped is the most avoidable mistake on the platform, and the most common. These four check dimensions before you upload, show which parts of a Reel are covered by Instagram’s own buttons, cut a wide image into a seamless carousel, and let you plan how nine posts will look side by side.
Carousel Splitter
Cut one wide image into seamless swipeable panels at 4:5, 1:1 or 3:4, then download them individually or as a ZIP.
Image & Video Size Checker
See whether your file posts clean or gets cropped, and fix it to spec with a focal point you control.
Reels & Stories Safe Zone Checker
Overlay the buttons, captions and progress bars that cover your design, and test whether your text survives.
Instagram Grid Planner
Arrange up to 18 images in a real 3-column grid, reorder by drag or keyboard, and export the plan as one PNG.
All four read your image with the Canvas API from a local object URL. Nothing is uploaded, which is why they are safe to use with a client’s unpublished campaign assets — there is no upload endpoint on this site for a file to go to.
What all twelve have in common
| Property | StealthGram | Typical free Instagram tool |
|---|---|---|
| Account sign-in | None — nowhere to enter one | Often required, sometimes your IG password |
| Where processing happens | Your browser | Their server |
| Image uploads | None — Canvas reads a local object URL | Uploaded and stored, often indefinitely |
| Working shown | Every multiplier displayed | Usually a single unexplained number |
| Works offline after load | Yes | No |
| Cost | Free, no tier withheld | Free tier, paid upgrade |
That table is a claim, so here is how to check it: open your browser’s developer tools, switch to the Network tab, load any tool page and then use it. You will see the initial page load — the HTML, one stylesheet, two small scripts, the tool module and two font files — and after that, nothing. Images appear as blob: entries, which are pointers to memory on your own machine rather than network transfers.
Why these tools and not others
Some of the most-searched Instagram “tools” cannot be built honestly, so they aren’t here:
- Private profile viewers. When an account is private, Instagram does not serve those images to anyone who is not an approved follower. No website can work around that, because the data is never sent. Every site claiming otherwise is either harvesting logins or running visitors through “human verification” offers that pay the operator per completion.
- Follower and like sellers. Buying followers damages the exact metric brands check first. Your follower count is the denominator of your engagement rate, so adding accounts that never interact drives the rate down mechanically — and it breaks Instagram’s terms.
- Anything that needs your password. Unfollower trackers, auto-DM bots and third-party schedulers that log in on your behalf are handing your credentials to someone else’s server. Instagram’s own Insights, under your Professional dashboard, cover most of what they promise.
- Downloaders for other people’s posts. That is a copyright question, not an engineering one, and it is not ours to answer for you.
Where the benchmark numbers come from
Several tools compare your figures against reference points: engagement rate by follower tier, sponsored post rates by niche, active hours by audience type. These are published industry ranges and transparent models, not live Instagram data and not a proprietary dataset we are hinting at having. Where a tool cannot know something, it says so rather than inventing a figure — the hashtag builder, for instance, never prints a post count for a tag, because it has no way to know one.
The same principle occasionally works against the tools themselves. The rate calculator states in its own results panel that its engagement multiplier bottoms out at ×0.70, which means it will still quote a higher price for an account padded with bought followers than for a smaller genuine one. A brand running a real audit will not. We would rather publish that limitation than let the number look more authoritative than it deserves.
Guides that go with the tools
Each tool page carries its own explanation, but the deeper background lives in the guides — how engagement rate is actually calculated and what a good one looks like, what Instagram does to your file on upload, where Reels safe zones really sit, and how the private-viewer scam economy works. Start from a pillar guide if you want the whole picture rather than one number: