Webhook payload tester
Validate, format and explore JSON payloads, then verify HMAC signatures for GitHub, Slack, Standard Webhooks and more.
CronCron builder
Build and validate cron schedules, read them in plain language and preview the next run times.
TelegramTelegram API builder
Compose Bot API calls (sendMessage, setWebhook and more) as URLs, curl commands and fetch snippets.
DiscordDiscord embed builder
Design rich embeds with a live preview, check Discord limits and export webhook-ready JSON.
SecretsToken and secret helper
Find leaked bot tokens and API keys in logs or code, redact them, generate strong secrets and decode JWTs.
RegexRegex tester
Test JavaScript regular expressions with highlighting, groups, replace preview and ReDoS protection.
TelegramTelegram keyboard builder
Design inline and reply keyboards visually, validate callback_data limits and copy reply_markup JSON.
DiscordDiscord slash command builder
Define slash and context-menu commands with typed options, validate Discord rules and export JSON, curl or discord.js code.
SlackSlack Block Kit builder
Compose header, section, context, actions, image and input blocks, preview them and copy chat.postMessage JSON.
WhatsAppWhatsApp message builder
Build text, image, template, reply-button, list and location payloads with limit checks and a curl command.
FlowsConversation flow designer
Sketch bot conversations as connected nodes, simulate them step by step and export a portable JSON graph.
LLMLLM token and cost estimator
Estimate tokens for prompts and history, context usage and daily or monthly cost for an AI bot.
HMACWebhook signature generator
Compute and verify HMAC signatures exactly as GitHub, Stripe, Slack, Meta, Shopify and Standard Webhooks send them.
HTTPcURL converter
Paste a curl command from API docs and get equivalent JavaScript fetch, Python requests and httpx code.
JSONJSON to types
Paste a webhook payload and get TypeScript interfaces, JSON Schema, Python TypedDict or pydantic models and Zod schemas.
HTTPHTTP status codes
Searchable list of HTTP status codes with what your bot should do: retry, back off, fix the request or stop.
RetriesBackoff and rate limit calculator
Visualize retry delays with full, equal or decorrelated jitter, total wait time and how long a broadcast takes under a rate limit.
robots.txtrobots.txt and user-agent tester
Check whether a crawler may fetch a URL under RFC 9309 rules, and review whether a bot user-agent is honest and contactable.
EncodingEncoder / decoder
Encode and decode Base64, Base64url, URL components, form data, hex, HTML entities, Unicode escapes and JSON strings, UTF-8 safe.
UUIDUUID / ID generator
Generate UUID v4, time-ordered UUID v7, ULID and nanoid in bulk, and decode Discord or X snowflake IDs to timestamps.
TimeTimestamp converter
Convert Unix seconds, milliseconds and ISO dates, and build Discord timestamp tags and Slack date tokens that render in each reader's time zone.
Why client-side?
Bot work involves credentials: bot tokens, webhook secrets, API keys. Online tools that process them on a server ask you to trust that server. These tools are static files: the page is served, and the computation happens on your device. The strict Content Security Policy only allows network calls to this site and, if you explicitly press Send in the Telegram builder, to api.telegram.org.