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Responsive Site Builder

A site still has to read well on a phone, a laptop and everything in between. This page explains how BYOB OnePage builds that responsiveness in from the first prompt.

Prompt to product

From one-line brief to finished app.

Compare the one-line brief with what BYOB ships. Real layout, data, and deploy status, editable from the same workspace.

TD

Team Tasks

Shared task tracking

Online
Today4
Done11
Streak6d
Open live app ↗
Prompt Product

Drag the handle. Or focus it and use the arrow keys.

Get inspired

Sites like this, live today.

Real sites that do it well. Build something like this with BYOB.

Config website
Config Hardware-team page with direct, plain copy. Visit ↗
observIQ website
observIQ Telemetry product with a technical hero. Visit ↗
Miro website
Miro Collaborative whiteboard with an inviting hero. Visit ↗
Vooma website
Vooma Logistics AI with a clear industry pitch. Visit ↗
Holocene website
Holocene Supply-chain page with calm, clear sections. Visit ↗
Outseta website
Outseta Membership platform with a launch-focused page. Visit ↗

Fresh from the community

See what builders ship, or start from an example.

View showcase →

Live workspace

Code, chat, and preview in one place.

The workspace is built for repeated product work, not disposable demos. Every generated file stays inspectable, every change is visible, and every follow-up can target the exact part of the app you care about.

01 · EDITOR

Generated code, ready to edit.

Every file BYOB writes stays visible and editable. Follow-ups target the exact lines you care about instead of regenerating from scratch.

  • Added lines highlighted the moment they land
Code
Act mode
TodoPage.svelte
schema.ts
1<script lang='ts'>
2type Task = { id: string; title: string; done: boolean }
3let tasks = $state<Task[]>([])
4
5function toggleTask(id: string) {
6task.done = !task.done // just added by BYOB
7}
8</script>
main · 0 problems Preview ready

02 · AI COMMAND

Plan, build, and refine in one chat.

Describe the outcome once. BYOB turns it into a build plan, implements it step by step, and keeps every change visible while you iterate.

  • Build plan with live progress you can inspect
B BYOB AI
Chat Act

Your prompt

“Build a todo app for beginners”

Build plan

80%
  • Task list UI + empty state
  • Add + toggle actions
  • Progress summary…
Add due dates and filter by done…

03 · LIVE PREVIEW

See every change the second it lands.

The preview updates as BYOB works, with deploy status attached, so the path from edit to production stays inspectable.

  • Real app state, not a static mockup
Live preview
/
TD

Team Tasks

Shared task tracking

Online
Progress 2 of 3 done
  • Wireframe landing page
  • Task list component
  • Responsive polish + QA
Ask BYOB to refine
Deployed · SvelteKit · SSL on

Prompt to app

From first prompt to a workspace you can ship.

Start conversationally, approve the shape, let Tool Mode implement, then refine and deploy from the same workspace.

  1. 01 Describe the product Start with the outcome, audience, and any constraints. BYOB turns the idea into a practical build plan.
  2. 02 Shape the UX Review the proposed flows, screens, data needs, and visual direction before code starts moving.
  3. 03 Generate the app Tool Mode writes SvelteKit code, connects integrations, and keeps each change visible in preview.
  4. 04 Test and refine Ask for edits, roll back when needed, run checks, and keep the project editable instead of disposable.
  5. 05 Deploy Ship the finished app, connect domains, and keep iterating from the same workspace.

Agent and backend

Code with your agent, ship with a real backend.

Connect Codex, Claude Code, or Antigravity to your project, then store data and ship to production without leaving the workspace.

  • Approve project access from BYOB
  • Installs the byob command
  • Preview, deploy, git diff, DNS, credits, and code tools
npm
npx -y byob-cli codex install

Approve only the projects your agent can touch, then read context, edit files, inspect diffs, test previews, and roll back from your terminal.

1
prompt to start
3
live panes
24/7
edge preview

Loved by builders

Rated 4.9/5 by developers and founders using BYOB to move from idea to shipped product.

Rated 4.9/5 by builders shipping with BYOB.

Start building
  • Clean SvelteKit code you own
  • One-click deploy + rollback
  • Pay as you go pricing

Built for shipping

The parts that usually slow you down are already here.

BYOB handles product planning, implementation, preview, testing, database work, and deployment from one focused interface, with coding-agent access and production analytics when you want to keep working from your own terminal.

This part is hands-on. The cards drift until you touch them. Drag to rearrange, or press and hold one to feel it push back.

Agent integrations

Give Codex, Claude Code, or Antigravity scoped access through BYOB CLI or Agent MCP. Your agent reads context, edits code, tests previews, and deploys from your terminal.

Git history and diffs

Every change lands as a commit. Inspect history, compare diffs, and see exactly what changed since the last deploy.

Inbox in every project

Every project ships with an inbox. Collect messages, leads, and feedback from your app without wiring a third party.

Email sending built in

Send magic links, OTP codes, and transactional mail from your own sender address. Resend-backed, no SMTP setup.

Google and magic-link login

Offer Continue with Google plus passwordless email codes. Sessions and callbacks are handled.

Custom domains and SSL

Point your domain at BYOB with guided DNS checks. Certificates are automatic.

Visual editing

Click any element in the live preview and describe the change. Copy, spacing, color, behavior.

AI testing agent

Run full-site or feature checks and get implementation-level feedback you can apply in one step.

Version rollback

Step between saved states or redeploy a known commit when an experiment goes sideways.

One-click deploy

Builds publish to production hosting in one step. Deploys can auto-save the project state first.

Deployment analytics

Worker traffic, errors, CPU timing, subrequests, and custom-domain status from the workspace.

Supabase aware

Connect Supabase and BYOB reads schemas, drafts migrations, and generates types that match your app.

Team collaboration

Invite people in and keep sessions coordinated so work never overwrites work.

  • Vision inputs
  • Voice coding
  • Project templates
  • SEO-ready output
  • Context tracking
  • Model lock

Simple pricing

Start with credits, upgrade when usage is steady.

Pay as you go when you are exploring. Move to Pro or Max when BYOB becomes part of your regular build workflow.

Pay as you go

$0

$1 = 100 credits

Popular

Pro

$25

2,000+ credits/mo

Max

$79

8,000+ credits/mo

Live estimator

What will your app cost?

Try the cost calculator. Drag the pages slider, toggle the options, and watch the agency quote vs BYOB update instantly.

Open full cost calculator →
Number of pages: 5
Traditional agency estimate

$5,750 upfront

Yearly maintenance

~$1,150 / year

BYOB estimate

~$45 in credits

BYOB builds the same site from one prompt and hosts it on the edge. Planning estimates, not quotes.

See BYOB plans
View full pricing

Need white-label and SSO? Talk to us →

BYOB OnePage generates a responsive website, so the layout, type and images adjust from phone to desktop without you writing media queries. Describe the page and it produces fluid, mobile-friendly markup you can edit and publish the same day.

What responsive means for a siter

Responsiveness is not a separate feature bolted onto a page; it is how the layout behaves as the viewport changes. On a site the stakes are higher, because there is no second page to fall back on if a section breaks. Everything from the hero to the footer has to reflow gracefully from a narrow phone screen up to a wide monitor, and the content order should stay sensible at every width.

Breakpoints without the busywork

BYOB OnePage generates layouts that use fluid grids and relative units rather than a stack of hand-written breakpoints. Columns collapse into a single column on small screens, spacing scales down, and side-by-side cards stack instead of overflowing. You still control the result: preview desktop, tablet and phone views, and ask for changes in plain language, such as moving the pricing block above the FAQ on mobile.

Type, images and tap targets

Three details separate a page that resizes from one that reads well. Type needs to stay legible without zooming; body text on a phone should not require pinching. Images should scale with their container and not push the layout wider than the screen. Buttons and links need to be large enough to tap comfortably with a thumb. The generated markup handles these by default, and you can adjust font sizes and image crops visually if a section feels cramped.

Why site stays responsive more easily

A multi-page site multiplies the surfaces that can break, since each template and component has its own responsive rules. A siter concentrates everything in a single flow, so once the sections reflow correctly you are done. That makes it realistic for a non-developer to keep the page responsive over time, even as sections are added or reordered, because there is one layout to reason about rather than a whole template hierarchy.

Checking on real devices

Device previews in the editor catch most problems early, but a real phone is the honest test. Load the published URL on your own phone and scroll through every section; watch for text that wraps badly, images that crop oddly or forms that are awkward to fill. Share the link with one other person, ideally on a different device, before you announce it. The published page is live on a shareable URL the moment you generate it.

When to intervene manually

Automatic responsiveness covers the ordinary cases, but a dense data table, a wide pricing comparison or a long code block may need a deliberate mobile design rather than a squeeze. For those, you can request a specific mobile arrangement or restructure the section so it works in one column. If the page genuinely needs complex interactive layout at every size, that is a signal the content may belong in a full app rather than a site.

FAQ

Frequently Asked Questions

Do I have to write media queries?

No. The generated layout uses fluid units and previews for each screen size; you refine it in plain language or visually.

How do I check the mobile view?

Use the device preview in the editor, then load the published URL on a real phone before sharing it.

Will my images stretch on mobile?

No. Images scale with their container; you can recrop or resize any that look off.

Does responsiveness affect page speed?

A lean site layout is generally fast. If you add heavy media, compress it so mobile visitors are not left waiting.

Is it free to preview and publish?

Generating and publishing a OnePage site is free to start, with paid plans for custom domains and heavier use.

Build the first version today.

Start with one clear prompt. BYOB will help turn it into a product you can inspect, edit, test, and ship.