Flash Test
The Flash Detection Test scans any URL for embedded Adobe Flash content — <object>, <embed> and direct .swf references — that have not worked in any major browser since end-of-life on 31 December 2020.
- Results in seconds
- Pass / fail + fix guidance
- No account required
The Flash Detection Test scans any URL for embedded Adobe Flash content — <object>, <embed> and direct .swf references — that have not worked in any major browser since end-of-life on 31 December 2020. Pages still loading Flash content are showing a broken plugin slot to every visitor and are typically also signalling a wider technical-debt problem. The fix is to replace each Flash asset with HTML5 video, canvas, SVG animation or a modern web component depending on its purpose.
What This Tool Checks
- <object type="application/x-shockwave-flash"> usage
- <embed src="*.swf"> usage
- Direct .swf references in <a> or <iframe>
- JavaScript references to swfobject or similar
- Fallback content provided when Flash fails
Why It Matters for SEO
Flash has not worked since 2020 — every Flash element on the page is dead weight today. Pages still relying on Flash usually have an entire section that is broken (videos that do not play, games that do not load, navigation that does not work). The SEO cost is direct: Google sees the broken content area and the high bounce rates that follow. The user cost is total: nothing in that area works.
How to Fix It
Inventory every Flash asset on the site. Replace videos with <video> + WebM/MP4. Replace interactive content with HTML5 canvas, WebGL, SVG animation or a proper web framework. Remove every <object> / <embed> reference to .swf and any "Please install Flash" fallback.
How It Works
We parse the page HTML and look for any pattern that historically embedded Flash content, including legacy fallback wrappers and JavaScript loaders. Each finding is reported with the appropriate HTML5 replacement strategy.
Common Mistakes to Avoid
- Hero video / banner still embedded as a SWF
- Game / interactive content abandoned because no one rewrote it
- Forgetting that Flash was removed from every browser in 2020
- Leaving Flash fallback warnings ("Please install Flash Player") in production
- Treating Flash content as "low priority" instead of broken
Quick Checklist
- No <object> or <embed> referencing Flash
- No .swf assets served from production
- Videos converted to HTML5 <video>
- Interactive content rebuilt with modern web tech
- "Please install Flash" messages removed
Put your whole site on autopilot — SEO and AI search
PositionMySite monitors every signal on this page across your entire website 24/7 — plus keyword rankings, competitor moves and AI-search readiness (llms.txt, schema, ChatGPT & Gemini visibility). When something breaks, you know before Google does.
Every feature unlocked · No commitment · Cancel anytimeFrequently Asked Questions
No. Adobe ended support on 31 December 2020 and every major browser has removed Flash Player. Any Flash content on a public website today is non-functional.
Use the HTML5 <video> element with MP4 (H.264) and WebM sources for broad compatibility. Most cloud video providers (Cloudinary, Mux, YouTube) handle the conversion automatically.
Rewrite using HTML5 canvas, WebGL or a game framework like Phaser, Pixi.js or PlayCanvas. There are also automated SWF-to-HTML5 converters for simple animations.
Yes. The broken content area produces poor user metrics and Google has long deprecated Flash crawling. Modern HTML5 replacements are crawlable and ranking-friendly.
No legitimate ones in 2026. If you still see .swf served from production it is legacy infrastructure that needs to be removed.