Free Marketing Tools
Free Social Media Marketing Tools
Write better captions, find relevant hashtags, size images correctly and measure your engagement, all with free social media tools that need no signup.
Posting consistently on social media is hard enough without wrestling with blank captions, guessing at hashtags and re-cropping images for every platform. These free social media marketing tools take the friction out of the parts that slow you down, so you can spend your energy on ideas and community instead of formatting and second-guessing.
There is nothing to download and no account to create. Use the caption writer when you are stuck, the hashtag generator to widen your reach, the engagement calculator to see what is actually working, then take the free OnOur brand audit to check whether your social presence lines up with your website and the rest of your brand. Strong individual posts matter less when the bigger picture is inconsistent.
The Toolkit
7 free tools for social media
Bio GeneratorAI
Generate professional bios for Instagram, LinkedIn, X, and TikTok using AI. Choose your tone and length.
Caption WriterAI
Generate engaging social media captions with AI. Choose platform, tone, and length.
Hashtag GeneratorAI
Enter a topic or niche and get ranked hashtag sets for Instagram and TikTok.
Engagement Rate Calculator
Work out your social media engagement rate and get a benchmark verdict for your platform.
Social Media Audit
Snapshot of your social media profile completeness, posting frequency, and engagement.
Image Resizer
Resize a single image to all social media platform dimensions in one click. Instagram, Facebook, LinkedIn, X, and more.
OG Image Maker
Create Open Graph images for your blog posts and pages using customisable templates.
Turn a blank caption into a finished post
The hardest part of most posts is the first line. The caption writer gives you a starting point built around your topic and tone, so you can edit rather than stare at an empty box. Pair it with the bio generator to sharpen the short profile description that decides whether a new visitor follows you or scrolls on. A clear bio and a confident caption do more for growth than most people expect, because they shape the first impression every single time.
Reach the right people with the right hashtags
Hashtags still help the right audience find your content, but only when they are relevant and varied. The hashtag generator suggests tags around your subject so you are not reusing the same tired ten on every post, which platforms can read as spammy. Aim for a mix of broad and specific tags rather than only the biggest ones, since huge hashtags bury your post in seconds while niche tags keep it visible to the people most likely to care.
Make your images fit every platform
Nothing undercuts a good post like a badly cropped image. The image resizer lets you produce the correct dimensions for feeds, stories and profile images without opening design software, so heads are not cut off and text is not lost at the edges. The Open Graph image maker creates the preview image that appears when your link is shared, which is often the difference between a link that gets clicked and one that looks broken. Both take seconds and lift the perceived quality of everything you share.
Measure what works, then do more of it
Follower counts flatter, but engagement tells the truth. The engagement rate calculator shows how much your audience actually interacts relative to your following, which is the number worth watching over time. Run the social audit to get a wider read on how your profiles are set up and performing. Once you can see which posts and formats earn real engagement, you can stop guessing and repeat what genuinely lands with your audience.
FAQ
Common questions
Do these tools post to my accounts for me?
No. They help you create and measure content, but you stay in full control and publish through your own accounts. Nothing connects to your logins.
Is the hashtag generator up to date with current trends?
It suggests relevant tags based on your topic to widen your reach. Treat the output as a strong starting list and adjust for any trends specific to your niche.
Which image sizes should I use?
It varies by platform, but the image resizer includes the common presets for feeds, stories and profiles so you do not have to memorise dimensions.
What counts as a good engagement rate?
There is no universal figure, and it varies by platform and audience size. A common rule of thumb is that smaller accounts tend to see higher rates, so track your own trend rather than chasing a benchmark.
How does the OnOur brand audit fit in?
The free audit looks beyond social media at your website, reviews and overall brand, so you can see whether your strong social presence is being supported everywhere else your customers look.
Related tool collections
Helpful guides
Prefer it done for you?
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See where your whole brand stands
The tools fix the pieces. The free 4-minute brand audit scores your entire digital presence across 12 categories, so you know exactly what to work on next.
Take the free brand audit