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What are Developer Tools tools on ToolYour?
Developer Tools on ToolYour cover the small, repeatable jobs that sit between writing code and shipping it: reading an unformatted payload, proving a config parses, encoding a value that keeps breaking a URL, checking what a regex actually matches, and confirming a schedule fires when you expect. The category is organised as four clusters. **JSON and encoding** covers [JSON Formatter](/developer-tools/json-formatter), [JSON Validator](/developer-tools/json-validator), Base64 and URL encoding, UUIDs, timestamps, and regex. **Codegen from samples** turns one JSON blob into TypeScript, Zod, Go, or Python starting points and converts between JSON, YAML, and XML. **HTTP and auth** mints HS256 test tokens, reads live response headers, builds cURL and fetch snippets, and parses User-Agent and IP strings. **Formatters, minifiers, cron and colour** keep HTML, CSS, JavaScript, and SQL readable, then shrink assets and translate schedules and design tokens. These are focused utilities with stated limits, not an IDE, an API client suite, or an LLM code generator. Sample-based codegen produces drafts you refine; heuristic SQL checks never touch a database; the lite minifiers are not Terser or cssnano. Every tool in the category is API-backed, so the browser version, the REST route under /api/v1/developer-apis, and the MCP tool all run the same code on one API key and one shared credit pool.
What are the main developer tools benefits?
- Four linked clusters — JSON and encoding, sample codegen, HTTP and auth, formatters and minifiers — so one job leads naturally to the next
- Every tool states its limits up front: sample inference, heuristic SQL checks, and lite minifiers are labelled as drafts, not production guarantees
- Identical behaviour in the browser, over REST at /api/v1/developer-apis, and through MCP for agents
- One API key and one shared monthly credit pool across REST and MCP — local transforms cost 1 credit, URL fetches cost 3
- Security peers such as JWT Decoder and Hash Generator are cross-linked from the Developer Toolkit instead of duplicated here
Start with JSON, encode, and HTTP helpers
- JSON formatter
Pretty-print or minify JSON with stable indentation.
- JSON validator
Check whether a payload is valid JSON before you ship it.
- Base64 encoder/decoder
Encode or decode UTF-8 text as Base64 (not image upload).
- Regex tester
Run a pattern against sample text and list matches.
- JSON to TypeScript
Infer a TypeScript type from a JSON example.
- HTTP headers checker
Fetch a URL and list response headers (not security scoring).
- JWT decoder
Related security — decode JWT header/payload (verify separately).
- Compare texts
Related digital — compare two texts for diffs and similarity.
Developer Tools tools
Format JSON, XML and SQL, encode Base64 and URLs, test regex, mint HS256 JWTs, and read HTTP headers — in the browser, over REST, or through MCP.
- Free
- No signup
- Fast
developer tools
Color Converter
Convert a hex, rgb(a), or hsl(a) colour into all four notations at once, preserving alpha.
Freedeveloper tools
JS Minifier
Shrink JavaScript with a lightweight comment and whitespace pass, reporting byte counts and a caveat.
Freedeveloper tools
CSS Minifier
Strip comments and whitespace from CSS and report original versus minified byte counts.
Freedeveloper tools
Cron Expression Parser
Parse a cron expression and list the next eight UTC run times so you can sanity-check a schedule.
Freedeveloper tools
Cron Expression Generator
Build a five-field cron expression from schedule fields and preview the next five run times in UTC.
Freedeveloper tools
Regex Generator
Return a vetted regex preset for email, URL, IPv4, UUID, digit, or slug shapes, each with a stated limitation.
Freedeveloper tools
SQL Validator
Flag empty statements, unbalanced parentheses, stacked statements, and missing SQL verbs without a database.
Freedeveloper tools
SQL Formatter
Reformat SQL with keyword casing and clause line breaks so long queries become reviewable.
Freedeveloper tools
JS Formatter
Pretty-print JavaScript with Prettier and the babel parser, surfacing syntax errors instead of hiding them.
Freedeveloper tools
CSS Formatter
Pretty-print CSS with Prettier for readable stylesheets, cleaner diffs, and easier specificity review.
Freedeveloper tools
HTML Formatter
Pretty-print HTML with Prettier so templates and response bodies become readable and reviewable.
Freedeveloper tools
IP Address Tools
Validate and classify IPv4 or IPv6 strings, including private and loopback ranges, with no external lookup.
Freedeveloper tools
User Agent Parser
Parse a User-Agent string into browser, operating system, and device hints for log triage.
Freedeveloper tools
API Request Builder
Compose method, URL, headers, and body into copy-ready cURL and fetch snippets without sending the request.
Freedeveloper tools
HTTP Headers Checker
Fetch a public URL and list every response header for CORS, caching, and content-type debugging.
Free
What other ToolYour categories relate to Developer Tools?
- Marketing Tools tools
Build UTM links, check ads copy limits, QA email subjects, and calculate ROAS/CPC/CTR — free in the browser; R
- Security Tools tools
Check HTTP security headers, TLS, cookies, JWTs, passwords, hashes, and SPF/DKIM/DMARC — free in the browser;
- AI Tools tools
Transcribe audio and summarize video in the browser. Open a tool, paste a file or URL, get text—no signup for
- Popular tools
Browse the most-used free tools across all categories.
What are common developer tools questions?
Direct answers about developer tools tools on ToolYour.
What jobs do Developer Tools cover?
Local transforms (format, validate, encode, convert), sample-based codegen for TypeScript, Zod, Go and Python, HS256 JWT minting for tests, live HTTP header inspection, request snippet building, User-Agent and IP parsing, cron scheduling, minification, and colour conversion.Are these tools available on MCP?
Yes. Every tool in this category is API-backed, so each one is exposed to agents at the ToolYour MCP endpoint using the same API key and the same monthly credit pool as REST. Local transforms cost 1 credit; the URL fetch in HTTP Headers Checker costs 3.Where are JWT decode, hashing, and header scoring?
Those live under Security Tools and are cross-linked from the Developer Toolkit: JWT Decoder and JWT Signature Verifier for inspecting tokens, Hash Generator and HMAC Generator for digests, and Security Headers Analyzer for graded CSP and HSTS reports. JWT Generator here only mints HS256 test tokens.How accurate is the codegen from a JSON sample?
It is structural inference from the one sample you paste. Empty arrays widen to unknown, optional fields look required, and unions collapse to whichever type appeared first. Treat the output as a scaffold and refine nullability and unions in your editor before committing.What do these tools not replace?
They do not replace your language server, a production API client, a database engine that can actually parse your SQL dialect, a full build-time minifier such as Terser or cssnano, or a schema validator. Outputs are draft helpers — verify before shipping.
Popular in this category
developer tools
Color Converter
Convert a hex, rgb(a), or hsl(a) colour into all four notations at once, preserving alpha.
developer tools
JS Minifier
Shrink JavaScript with a lightweight comment and whitespace pass, reporting byte counts and a caveat.
developer tools
CSS Minifier
Strip comments and whitespace from CSS and report original versus minified byte counts.
developer tools
Cron Expression Parser
Parse a cron expression and list the next eight UTC run times so you can sanity-check a schedule.
developer tools
Cron Expression Generator
Build a five-field cron expression from schedule fields and preview the next five run times in UTC.
developer tools
Regex Generator
Return a vetted regex preset for email, URL, IPv4, UUID, digit, or slug shapes, each with a stated limitation.
developer tools
SQL Validator
Flag empty statements, unbalanced parentheses, stacked statements, and missing SQL verbs without a database.
developer tools
SQL Formatter
Reformat SQL with keyword casing and clause line breaks so long queries become reviewable.
developer tools
JS Formatter
Pretty-print JavaScript with Prettier and the babel parser, surfacing syntax errors instead of hiding them.
developer tools
CSS Formatter
Pretty-print CSS with Prettier for readable stylesheets, cleaner diffs, and easier specificity review.
developer tools
HTML Formatter
Pretty-print HTML with Prettier so templates and response bodies become readable and reviewable.
developer tools
IP Address Tools
Validate and classify IPv4 or IPv6 strings, including private and loopback ranges, with no external lookup.
developer tools
User Agent Parser
Parse a User-Agent string into browser, operating system, and device hints for log triage.
developer tools
API Request Builder
Compose method, URL, headers, and body into copy-ready cURL and fetch snippets without sending the request.
developer tools
HTTP Headers Checker
Fetch a public URL and list every response header for CORS, caching, and content-type debugging.
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