Cloudflare developer tools
Debug Cloudflare Workers Assets before you deploy
The Workers Assets Routing Simulator runs Cloudflare’s own router in your browser. Paste your build’s file list and see the status, redirect, and file served for any URL under your html_handling, not_found_handling, _redirects, and _headers.
Plus 47 free developer utilities below. No signup, no install, and your input stays in your browser.
JSON workspace
By ToolzyWorkflows
View allAPI DebuggingInspect requests, responses, tokens, URLs, payloads, headers, and scheduler-adjacent API behavior.4 toolsData TransformationTurn messy JSON, CSV, YAML, XML, SQL, query strings, and generated fixtures into shapes a developer can use.15 toolsEncoding & EscapingHandle Base64, URLs, HTML entities, binary text, byte views, and the boundaries between encoding, escaping, hashing, and encryption.5 toolsFrontend UtilitiesFormat markup and code, inspect styles, convert UI snippets, and prepare browser-facing assets.11 toolsSecurity HygieneInspect security-adjacent strings locally: hashes, passwords, JWTs, random tokens, signatures, and certificates.4 toolsTime, Date & SchedulingConvert timestamps, read cron expressions, compare time zones, and reduce scheduling ambiguity.2 tools
Learn
View allDebug a Cloudflare Workers Assets Redirect or 404 Before DeployTrace an unexpected 307 trailing-slash redirect and the wrong 404 page on Cloudflare Workers Static Assets, then fix html_handling, not_found_handling, and _redirects before you deploy.12 min · intermediateInspect a JWT From a Failing API RequestDecode a bearer token, read its claims, and check why auth works in one environment but fails in another.8 min · beginnerTurn Messy CSV Into API-Ready JSONClean a spreadsheet export into predictable JSON, then inspect the shape before handing it to an API.10 min · beginner
Utilities
Fast, free tools for everyday dev tasks. Paste and go.
Computer Science
Binary / Hex / Decimal ConverterConvert exact integers between base 2, 10, and 16ASCII / Unicode ExplorerInspect characters, code points, bytes, and escapesBitwise Operations CalculatorEvaluate AND, OR, XOR, NOT, and bit shifts by widthTwo's Complement CalculatorConvert signed decimals to fixed-width binary and backTruth Table GeneratorGenerate propositional logic truth tables in the browser
Code & Markup
Text / Code Diff CheckerCompare text or code with readable diff outputRegex TesterTest regex patterns with live highlightingHTML FormatterFormat or minify HTML codeCode FormatterFormat CSS, JS & TypeScript with PrettierMarkdown to HTMLConvert Markdown to HTMLXML Formatter & ValidatorFormat, minify, and validate XMLSQL FormatterFormat SQL queries with dialect-aware rulesCron Expression ParserExplain cron schedules and preview upcoming run timescURL to fetch / AxiosConvert curl commands into fetch or axios codeHTML to JSX ConverterConvert pasted HTML into JSX-friendly markup
JSON & Data
JSON ValidatorValidate & pretty-print JSONJSON FormatterFormat, minify, and filter JSON by keysJSON VisualizerVisualize and filter JSON as an interactive node graphCSV to JSONTransform CSV data to JSONYAML ↔ JSON ConverterConvert YAML to JSON and JSON to YAMLQuery String Parser / JSON ConverterConvert query strings and flat JSON objects both waysJSON to TypeScript Interface GeneratorGenerate TypeScript interfaces from JSON samplesJSON Schema Validator / GeneratorValidate JSON with Draft 2020-12 or generate starter schemas
Encoders & Decoders
Base64 EncoderEncode or decode Base64 stringsImage to Base64 ConverterConvert images to Base64 data URIs and backURL EncoderEncode or decode URL stringsURL Parser / InspectorInspect normalized URL parts and decoded query parametersHTML Entity Encoder / DecoderEncode text as HTML entities or decode entities back to textMorse Code TranslatorTranslate text to and from Morse codeBinary Code TranslatorConvert text to binary and backROT13 / Caesar CipherEncode with ROT13 or Caesar cipher