astrojamstack
Astro form handling without serverless functions
How to receive form submissions in an Astro site without writing an API route, server endpoint, or serverless function.
2026-05-07 7 min read
Blog
Notes from the Formspring team
Form backend tactics, framework recipes, and the operational details that don't fit in the docs.
file-uploads3
File uploads from HTML forms without S3 keys
The four ways to handle file uploads from a static-site form. Tradeoffs, code, and why most teams pick option 4.
2026-05-07 7 min read
mailtoform-backend
From mailto: to form backend: when to upgrade
The mailto: link works until it doesn't. Five signals that tell you when to upgrade to a real form backend, and what changes when you do.
2026-05-07 7 min read
gdprprivacy
GDPR-compliant form submissions: what you actually need to know
The non-lawyer's guide to GDPR for HTML forms - lawful basis, DPA, data residency, retention, and what to put on the form itself.
2026-05-07 6 min read
spam-protectionhcaptcha
Honeypot vs reCAPTCHA vs hCaptcha: form spam protection compared
Three approaches to stopping form spam, with honest tradeoffs on accuracy, accessibility, privacy, and user friction.
2026-05-07 5 min read
nextjsreact
How to receive form submissions in Next.js without a backend
Three patterns for Next.js form submissions: client component, server action, and pure HTML. With code, tradeoffs, and the bug that bites everyone.
2026-05-07 7 min read
webhookssecurity
How to verify HMAC webhook signatures in Node, PHP, and Python
Constant-time HMAC verification in three runtimes - with the bugs that get past code review.
2026-05-07 6 min read
jamstackcontact-form
JAMstack contact form: the complete 2026 guide
Everything you need to ship a contact form on a JAMstack site without spinning up a backend - 5 approaches compared, with real code.
2026-05-07 6 min read
migrationformspree
Migrating from Formspree to Formspring: a 5-minute guide
Switch from Formspree to Formspring without breaking your forms or webhook receivers. Real code, real steps, real timing.
2026-05-07 5 min read
reactforms
React form submissions without React Hook Form
How to handle React forms without a validation library — plain HTML5 + the Constraint Validation API + a hosted backend. Zero dependencies, zero bundle bloat.
2026-05-07 7 min read
static-sitecontact-form
Static-site contact form: the 2026 playbook
The complete contact-form playbook for static sites in 2026 — from one-line HTML to multi-step JAMstack with signed webhooks, retention rules, and AI moderation.
2026-05-07 7 min read
webhooksretry
Webhook retry strategies: exponential backoff explained
How webhook senders should retry failed deliveries — exponential backoff math, jitter, idempotency keys, and the bugs that ruin good intentions.
2026-05-07 6 min read
Topics
tutorial 11contact-form 5jamstack 4security 3forms 2react 2webhooks 2static-site 2astro 1file-upload 1s3 1mailto 1form-backend 1upgrade 1gdpr 1privacy 1compliance 1eu 1spam-protection 1hcaptcha 1recaptcha 1nextjs 1nodejs 1php 1python 1migration 1formspree 1react-hook-form 1html5 1playbook 1retry 1backoff 1reliability 1
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