Accessibility isn't a niche concern. For solo social managers, making posts accessible is a growth move and a risk management move. Accessible posts reach more people, perform better in search and recommendations, and reduce the chance a client faces a public complaint or a legal issue. This checklist gives you 15 clear, practical checks to run every time you create and schedule content. It's written for one person juggling several clients, tight deadlines and limited tools. No academic theory, just things you can do in 5 minutes that add up to weeks of extra reach over a quarter.
Checked by Mydrop's publisher, September 2026: the caps a scheduler enforces before your post is sent. They are not always what the app shows you while you type.
| Platform | Caption limit | Also enforced |
|---|---|---|
| 2,200 characters | Instagram caps posts and Reels at 5 hashtags; count them yourself | |
| TikTok | 2,200 characters | hashtags count inside the caption |
| X | 280 weighted characters | no separate hashtag cap |
| Bluesky | 300 characters | no separate hashtag cap |
| 500 characters of alt text | no separate hashtag cap |
A scheduler can reject a caption the app itself would have accepted, which is why a scheduled post fails at send time rather than when you wrote it.
Start here. Before you post, run the checklist on captions, images, video, links and scheduling. The goal is simple: more of your audience can understand your content and act on it. Each main section below explains why a check matters, what to look for, and how to fix common mistakes. If a client asks whether accessibility matters, give them two answers: yes, because it grows reach, and yes, because it reduces risk. The rest of this article shows exactly what to do.
1. Write captions for clarity and readability
Good captions help everyone. They help people using screen readers, people scrolling with limited attention, and anyone who opens your post on a small screen. Start with a clear opening sentence that states the main idea. Use short paragraphs and line breaks. Avoid long blocks of text that force people to scroll without context.
Checklist items
- Start with the point. Put the most important idea in the first 1 to 2 lines. This helps people decide whether to tap through, and it benefits platforms that show preview text.
- Use plain language. Replace jargon with short phrases a client could read out loud. If you must use an acronym, spell it out the first time.
- Break long captions into short paragraphs. On platforms like Instagram and LinkedIn, short paragraphs are easier to skim and easier for assistive tools to parse.
- Use descriptive link text. If you add a link, avoid "click here." Use text that describes the destination, for example "Download the invoice template" or "See the full case study." This helps people using screen readers and anyone scanning the caption.
- Add transcript summaries for audio-first posts. If your post is an audio clip or voice note, include a short transcript or a summary of the message in the caption.
How to fix common mistakes
If your caption is one long paragraph, split it into 2 to 4 lines of no more than 20 words each. If it includes a complex idea, add a short example or a one-line summary. For recurring templates, create a short, plain-language pattern you reuse so clients get a consistent tone and clear messaging.
Why this matters
Readable captions reduce friction. If someone using a screen reader can get the headline and the CTA quickly, they're more likely to engage. And if a client sees a short, clear caption, they can repurpose it for email or stories without heavy editing.
2. Add meaningful alt text to images
Alt text is the single easiest accessibility win for images. It's also one of the highest-leverage items on this checklist, because platforms and assistive tools use it to describe images to people who can't see them. Alt text also helps image search and can improve SEO for social previews.
Checklist items
- Describe what the image shows, not what the design process was. Instead of "graphic by designer," write "Woman holding a phone and smiling, showing a social media feed." Keep it short and useful.
- Include context that matters. If the image supports a point, mention that connection. For example, "Screenshot of engagement report showing 12 percent weekly growth." This tells the user why the image matters.
- Avoid repeating visible text. If the image already contains the caption text, don't copy it word for word. Summarise instead and add the missing details, such as tone or who's pictured.
- If the image is purely decorative, mark it as decorative. On many platforms you can leave alt text empty or mark it so screen readers skip it.
- Use keywords sparingly and naturally. Alt text isn't the place for keyword stuffing. Write for a human first.
How to fix common mistakes
If you find "photo.jpg" or "image.png" as alt text, replace it immediately with a short descriptive sentence. For product images, include the product name and the purpose of the image. For client case images, include the call to action or result the image highlights.
Why this matters
Alt text makes images useful to people who depend on assistive tech. It also reduces confusion when images fail to load. You can write a short, meaningful alt text in 10 to 30 seconds, and it has an outsized impact on reach and clarity.
3. Use good contrast and readable text in images
Lots of posts put important words inside images. When that happens, make sure contrast and font size don't block readability. Low contrast or small type excludes people with low vision, and anyone viewing content in bright daylight or on a low-quality screen.
Checklist items
- Keep important text at a contrast ratio of at least 4.5 to 1. If a design tool shows contrast numbers, aim for 4.5. If you don't have a tool, squint at the image; if the title disappears, increase the contrast.
- Use large, simple fonts for on-image text. Small script fonts look nice but are hard to read at mobile sizes.
- Avoid placing text over busy backgrounds without a solid overlay. A semi-opaque dark overlay behind white text often solves the problem.
- Keep lines of text short. Avoid multi-line paragraphs inside images. One or two lines of headline text are easier to read.
- Check colour choices for colour blindness. Don't rely on colour alone to convey meaning. Use icons or labels as well as colour.
How to fix common mistakes
If you inherit a published image with tiny copy, recreate a simple version with larger type and a clean background. For client templates, create a high-contrast version and a second version in brand colour if needed. Keep both in your asset library.
Practical testing steps
- Quick phone test. Send the image to yourself and view it on the smallest phone you own. If the headline needs pinching or squinting, increase the font size or simplify the layout.
- Squint and desaturate. Squint at the image, then view a grayscale version. If the headline or key visual disappears in either test, adjust the contrast and spacing.
- Use free contrast checkers. Tools like WebAIM Contrast Checker or browser extensions give you quick ratios. If the text fails 4.5 to 1 for normal text, change the overlay or swap the text colour.
- Simulate colour blindness. Use a colour blindness simulator to check whether information carried by colour is still understandable. If not, add labels or icons.
- Test on low bandwidth. Save a lower-quality export and view it. If compression breaks legibility, simplify the image so key words stay crisp.
Design patterns that work
- Solid overlay with padding. When adding text over a photo, use a 15 to 25 percent dark overlay behind white text and add padding so the text doesn't touch the edges.
- Two size variants. Save a mobile-first version with a larger headline and a desktop variant for wider layouts. Use the mobile variant for stories, reels and single-column feeds.
- High-contrast brand palettes. Keep a high-contrast fallback palette for text-heavy templates and a brand palette for decorative use. This keeps consistency without sacrificing readability.
Why this matters
Readable images get shared more. Viewers often screenshot or forward clear images. A small design tweak, like adding an overlay or increasing font size, improves clarity for all viewers, not just those with vision issues. It also prevents negative client feedback about unreadable creative and cuts down on rework time.
4. Provide captions and transcripts for video and audio
Video is a top priority for reach, but silent autoplay and noisy public spaces mean captions are essential. Captions help deaf and hard-of-hearing users and improve comprehension for non-native speakers. Transcripts also make video content indexable and easy to repurpose.
Checklist items
- Add captions for all spoken content. Use native platform captioning or upload an SRT file. If automated captions are available, review and correct errors before publishing.
- Include a short transcript in the caption or link to a full transcript. For long videos, a short one-line summary plus a link to the transcript is enough.
- Avoid autoplaying sound without clear control. If a video starts with sound, add a text warning in the caption such as "Sound on." Prefer muted autoplay with captions.
- Add audio descriptions when visual details are essential. For product demos or tutorials, include a brief audio description of the actions that matter to users who can't see the screen.
- Use clear speaker labels when several people talk. In captions or transcripts, mark who is speaking so the context is preserved.
How to fix common mistakes
If you only used automated captions, spend time correcting names and technical terms. If you don't have a platform that supports caption uploads, paste a short transcript into the caption and include a timecode for key moments.
Why this matters
Captions boost average watch time and increase engagement on platforms that favour native captions. For clients with global audiences, captions also serve non-native speakers and open up reuse for blog posts and newsletters.
5. Make links and buttons accessible
Links and buttons are how people act on your posts. If a CTA is unclear, or a link label just reads "link" or "click here," you lose people who use screen readers. Make actions descriptive and make sure they open in the context people expect.
Checklist items
- Use descriptive CTAs. Replace vague text with specific actions such as "Download the checklist" or "Book a 15-minute call." This helps users who scan a page with a screen reader.
- Avoid relying on colour alone to show a link or a selected state. Add an underline or icon for clarity.
- Make sure external links open in a new tab and say so in the caption. Some users depend on keeping their context, so note when a link leaves the platform.
- Use short link previews when you can. If a platform creates a preview card, check the preview title and description for clarity, and update the meta if you control the destination.
- Test redirections. If your scheduling or booking URL redirects through tracking links, make sure the final destination is accessible and mobile-friendly.
Deeper guidance and patterns
- Write link text for context. Instead of "Read more," use "Read the full case study on reducing churn." That gives context to someone who hears a list of links in a screen reader.
- Add microcopy for external behaviour. If a link opens a PDF or a new window, add a short note in brackets like "(opens a PDF)" or "(opens in a new tab)." It's a small change that reduces anxiety.
- Keep tappable areas large. For touch devices, make buttons at least 44 by 44 pixels. If a link sits in a compact grid, add padding so users with motor difficulties can tap reliably.
- Provide keyboard focus states. For web-based landing pages or links in bios, make sure the visible focus ring is clear. If you control a page, test it by using Tab to move between links and check the focus outline is visible.
- Use aria-label sparingly and correctly. If a button only shows an icon, add an aria-label such as "Open booking form." But don't duplicate visible text with aria-label; screen readers will read both.
- Avoid ambiguous short URLs. If you use a short URL service for tracking, make sure the anchor text explains where it goes, so a screen reader user isn't left guessing.
Testing steps
- Screen reader review. Use a free screen reader, such as VoiceOver on Mac or TalkBack on Android, and navigate your post. Listen to whether links and buttons make sense out of context.
- Keyboard only. Try navigating using only the keyboard. Can you tab to every button and activate it with Enter or Space? If not, fix the HTML or the platform settings.
- Mobile tap test. Ask a teammate, or use a second device, to tap your CTAs. If taps miss or the wrong link triggers, increase the padding.
How to fix common mistakes
If a CTA reads "link in bio," update the bio link to a short page that clearly lists current campaigns and uses descriptive titles. If a platform limits anchor text, use the caption to add context. For example: "Register for the webinar, registration page (opens in a new tab)."
Why this matters
Clear CTAs reduce friction and increase conversions. They also help tools and assistive tech describe where a link goes, which raises trust and lowers bounce. A small change to CTA copy or tappable size can deliver measurable uplifts in clicks and completion rates.
6. Schedule with accessibility in mind and test previews
Scheduling tools are lifesavers, but they can also bake in mistakes. Scheduled posts often get no last-minute preview, which means alt text may be missing or captions may contain broken short links. Build a quick preview routine into your scheduling workflow.
Checklist items
- Preview posts in the actual platform view. Many scheduling tools show a general preview that isn't identical to the live post. Use the platform preview when it's available.
- Recheck alt text and captions after scheduling. Some tools strip metadata during publishing, so confirm the alt text is there on the live post soon after it goes out.
- Avoid inaccessible embeds. Third-party iframes like calendars and widgets can break network idle and create inaccessible experiences. If you embed third-party widgets, provide a text fallback.
- Time posts for context. Posting at odd hours can confuse global audiences. Note time zones in captions for live events and include a short time zone conversion if needed.
- Keep a short post checklist in your scheduler: caption, alt text, captions, link behaviour, preview screenshot. Make this a required step for each client calendar entry.
How to fix common mistakes
If you find missing alt text after a scheduled post goes live, edit the post immediately. Schedulers are helpful but not infallible. Build a habit of checking the first live post for each campaign, and adjust the template if the scheduler stripped data.
Why this matters
A small preview loop stops simple mistakes from reaching thousands of followers. It also protects you from embarrassing misses, like broken links or missing captions on crucial posts.
Conclusion
Accessibility work is practical work. These 15 checks fit into an efficient workflow and help solo social managers increase reach, lower risk and give their audience a better experience. Start by adding alt text and captions, then move on to contrast and readable text in images. Over time, make preview testing and descriptive CTAs part of your standard way of working. The investment is small and the returns are unmistakable: more inclusive reach, better engagement and fewer post-publish emergencies.
Make it part of your routine
- Add the checklist to new client onboarding. When you take on a client, share a one-page PDF of this checklist so expectations are set early. Explain that accessibility is part of quality control, and the client will see small lifts in engagement and fewer errors.
- Bake it into templates. Add alt text fields, caption templates and a caption review step to every content calendar row. If you use a shared spreadsheet, add a "checked" column for alt text and captions so nothing slips.
- Train once, save hours later. Spend 30 to 45 minutes training a client or teammate on these steps and you'll save hours on rework each month.
Measure impact
- Track click-through rate and watch time. After you adopt captions and descriptive CTAs, look for increases in watch time and CTR for posts with the new treatment versus the old.
- Monitor error rates. Track how often you need to edit a live post for missing alt text, broken links or wrong captions. A drop is a sign your checklist is working.
- Collect direct feedback. Ask followers occasionally whether the captions and transcripts are helpful. A short poll in Stories or a pinned post asking for feedback gives you fast qualitative signals.
Common client objections and short replies
- "Will this slow me down?" Short answer: not if you add it to your template. The first few weeks take a bit more time, but soon it becomes a 30-second habit per post.
- "No one in my audience needs it." Say this: more people than you think benefit. Captions help viewers in noisy places, alt text helps when images fail to load, and clear CTAs help everyone convert.
- "It will ruin my design." Design can be preserved with sensible fallbacks. Use decorative versions for artful posts and accessible versions for informational posts. Clients expect a balance between beauty and clarity.
Scale without pain
For multi-client work, keep an "accessibility kit" in your asset library: two caption templates, two image templates with overlay, a standard alt text format and a microcopy cheat sheet for CTAs. When you onboard a new client, duplicate the kit and rename it. This cuts time to production and keeps consistency across accounts.
Final checklist to copy and paste
- Caption: clear lead, 2 to 4 short lines
- Alt text: short description with context
- Image text: 4.5 to 1 contrast, large font
- Video: captions plus transcript or linked transcript
- Links: descriptive text, mention external behaviour
- Schedule: preview on platform, confirm metadata
Accessibility isn't a compliance checkbox. It's a practice that improves results and protects your brand. Make these 15 checks part of what you do every day and you'll create content that reaches more people, converts better, and costs you less time fixing mistakes.




















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