404 Page Generator is free, actively maintained, and improving often. Here is the full history of what has shipped — from v0.1 onward — with the most recent changes at the top. Bigger releases move the version by a tenth; small refinements, by a hundredth.
June 26, 2026 Latest
- v1.08 New Upsender added to the example gallery — a new entry in the "404 pages worth stealing from" gallery. Upsender, an email-deliverability firm, turns its 404 into a live demo: you drag a dial to move the "undelivered" page from the spam folder into the primary inbox. A textbook brand-derived interactive centrepiece, now showcased alongside the other examples.
May 29, 2026
- v1.07 Improved No more half-finished pages from "Generate it for me" — if a generated 404 ran past the length limit before it was done, the cut-off page could still come back looking like a success. Now an incomplete generation is caught and you're asked to try again or copy the prompt into your own AI, instead of being handed a broken page.
- v1.06 Improved Behind-the-scenes housekeeping — routine maintenance and reliability tidy-up under the hood. Nothing changes in how the tool looks or works.
May 28, 2026
- v1.05 Improved Smarter prompt when the site scan can't find your menu — when the auto-scan detected your site but couldn't pull your navigation links, the prompt still told the AI to "use the navigation links above" as the only source — even though none were listed. That left the AI with no links to work from while also being told not to invent any. Now, if the scan misses your menu, the prompt instead asks the AI to open your site and read the real header and footer links itself, so the "did you mean?" and escape routes always point at pages that actually exist.
May 26, 2026
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v1.04
Improved
Link-builder links now land on the scorecard — share links built with customizer options (tone, illustration, humor) were dropping visitors at the form area instead of the scorecard, because the trailing
#generatorfragment triggered a browser scroll that fired after our auto-scroll. The homepage now strips the fragment on arrival, and the link-builder no longer adds one. Old links already in the wild are fixed too. - v1.03 Improved Share-link URL now types in — when you opened a share link, the URL pill stayed empty during the scan and only popped in at the very end. The typing animation was being cancelled by a hoisting quirk in the prefill code. Fixed, so the URL now types in character-by-character right as the scan begins, the way it does for a regular generation.
May 25, 2026
- v1.02 New Scorecard reveal — every generation now opens with a live scorecard: your URL types into a pill with your site's favicon and a pulsing orange ring while we scan, then the ring flips to a steady green glow as a red-to-green gauge sweeps to your score and the F-D-C-B-A grade ladder lights up and settles on your tier. One click jumps to the full breakdown + desktop and mobile previews; the orange CTA below points you at the A+ prompt.
- v1.02 New Live prompt updates — tweak the tone, illustration, language or any other customizer field and the prompt rebuilds itself automatically a moment later. No need to click Generate again.
- v1.01 New Copy share link — one click gives you a shareable URL that re-opens the generator with the site, prompt and current-404 grade already loaded for whoever you send it to.
- v1.0 Improved Mobile and desktop previews — the "Your current 404 page" panel now shows your page at both a phone width and a desktop width, side by side.
- v0.99 New Instant 404 grader — your current 404 page is now scored 1–100 with an A+ to F letter grade against the 12-point checklist, so you can see exactly where it stands and what to fix.
- v0.98 New This changelog — a running list of every update, newest first, linked from the footer of every page.
- v0.97 New One-click "Generate it for me" — a quick way to build a 404 page right on the site, no copy-and-paste needed. For the best result, copying the prompt into a top-tier AI like Claude or ChatGPT is still the recommended route.
May 23, 2026
- v0.95 Improved SEO refinements across the site's page content and messaging.
- v0.94 Improved A glowing 404 logo animation added to the guide pages.
- v0.93 New Easier to find through AI — added an llms.txt file and structured data so AI assistants can discover and recommend the tool.
- v0.92 New Platform guides — step-by-step instructions for WordPress, Shopify, Webflow and Next.js, plus a guide to fixing soft 404 errors.
- v0.89 New A 404-page skill for AI assistants — lets AI coding tools build a page straight from a brief.
- v0.88 New Prompt API — fetch a finished, tailored 404-page build brief for any site as plain text, for use in your own tools.
- v0.86 New Shareable links — pre-fill the generator for any website with a single link, so you can hand someone a ready-to-run setup.
- v0.84 New Automatic brand detection — the generator inspects a site's platform, navigation links, colours and fonts, and builds them straight into the prompt.
- v0.8 Improved A much sharper generation prompt — a major rewrite that pushes the AI for a genuinely interactive, on-brand 404 page rather than a static error screen.
- v0.7 Improved Clearer customisation options — the generator's settings are easier to see and use.
May 21, 2026
- v0.69 Improved Polish — refined the box beneath the Generate button, the headline, and the hero image.
- v0.68 Improved Faster page loads — several rounds of performance tuning.
- v0.66 Improved The prompt now starts clean — no preset default, so every page is built from your own choices.
- v0.65 New Google Gemini — added to the one-click AI hand-off options.
- v0.63 Improved Tuned the dark-mode colour palette for better contrast and feel.
- v0.62 New Flashlight mode — an interactive lighting effect to play with on the 404 page.
- v0.59 New Interactive 404 hero — an explorable HTTP-status visual on our own 404 page.
- v0.49 Improved The Golden Ratio redesign — the entire site rebuilt on a cleaner, proportion-based design system.
- v0.39 New A typed, rotating subheadline on the homepage.
- v0.38 New Examples gallery — added CTO Jobs HQ, a 404 page built start to finish with this tool, plus a card featuring our own 404 page.
- v0.35 Improved Refreshed the social share card for nicer link previews.
- v0.34 Improved New favicon and a refined mobile layout.
- v0.32 Improved A fresh new logo, plus a reworked logo in the footer.
May 20, 2026
- v0.3 New "Submit your 404" box — share a new 404 page you've built with the tool.
- v0.28 New Live counter — a running total of 404 pages generated.
- v0.26 New Link-preview card — a proper share card so the site unfurls nicely when posted.
- v0.24 New One-click hand-off to ChatGPT and Grok — send the generated prompt straight to your AI of choice.
- v0.22 Improved Bot protection — added to keep the free tool fast, stable and abuse-free.
- v0.2 New Rebuilt as a Cloudflare Worker — converted to a fast, modern setup for quick loads worldwide.
- v0.1 New 404 Page Generator launched — the first version of the free tool for turning any site into a custom, on-brand 404 page. No account, no opt-in.
Put the latest to work
Every update above is live in the generator. Enter your site and get a custom, on-brand 404 page in the right code format for your platform.
Generate my 404 page →Free · no account · no opt-in