Electronics developer tools

JSON FormatterFormat, minify, and validate JSON directly in your browser. ↗

JSON StringifyTurn JSON into a JSON string literal or decode a stringified JSON document locally. ↗

JSON Tree ViewerExplore JSON, YAML, TOML, and XML as a searchable, collapsible tree in your browser. ↗

JSON ↔ YAML ↔ CSVConvert JSON, YAML, and CSV locally with inferred input and explicit output format. ↗

JSON to TypesInfer TypeScript, Go, or Python data models from a JSON sample locally. ↗

JSON → SchemaInfer a Draft 2020-12 JSON Schema from representative JSON without uploading it. ↗

Schema ValidatorValidate JSON against a local Draft 2020-12 schema and inspect every failing path. ↗

JSON Patch TesterApply RFC 6902 JSON Patch or RFC 7396 Merge Patch locally and inspect the resulting document. ↗

.env → ConfigGenerate a validated TypeScript, Go, or Python configuration loader from .env.example. ↗

JSON DiffCompare two JSON documents and see exactly what changed in your browser. ↗

Text DiffCompare source, configuration, logs, or arbitrary text with focused line-by-line changes. ↗

JWT DecoderDecode JWT headers and payloads, and verify HS256 signatures, without sending your token or key to a server. ↗

Certificate InspectorInspect PEM or DER X.509 certificate identity, validity, names, keys, and fingerprints locally. ↗

SSH Key InspectorDecode OpenSSH public keys, fingerprints, comments, and authorized_keys options locally. ↗

Base64Encode text to Base64 or decode Base64 strings directly in your browser. ↗

URL EncoderEncode or decode URL components locally without exposing query data to the server. ↗

Unix TimestampConvert Unix timestamps and ISO dates locally in your browser. ↗

UUID GeneratorGenerate random UUID v4 values locally without sending them anywhere. ↗

Random TokensGenerate cryptographically secure random tokens locally in your browser. ↗

URL InspectorBreak a URL into its parts and decode every query parameter locally, with credentials in the query string flagged. ↗

Nginx ConfigGenerate an nginx server block for a reverse proxy or a static site, including the directives that belong in the http block. ↗

systemd UnitWrite a complete systemd .service file from a few fields, including the directives that only work in pairs. ↗

.env TemplateGenerate a starter .env for the services you use, with conventional names and working local defaults. ↗

.gitignoreBuild a .gitignore from maintained fragments for your languages, frameworks, editors, and tooling. ↗

.env.exampleTurn a real .env into the .env.example you can commit, with every value emptied unless a stated rule keeps it. ↗

.env DiffCompare two .env files by key. Values stay masked until you reveal them, and nothing is uploaded. ↗

HMACCompute and verify HMAC-SHA256, SHA-384, and SHA-512 signatures locally. Your payload and secret never leave the browser. ↗

Hash GeneratorGenerate SHA-256, SHA-384, or SHA-512 hashes locally for text or files, with optional digest verification. ↗

Regex TesterTest a JavaScript regular expression against your text, with every match, capture group, and replacement shown locally. ↗

Cron ParserExplain five-field cron expressions and calculate upcoming runs locally. ↗

CIDR CalculatorCalculate IPv4 network, broadcast, mask, and usable address ranges locally. ↗

SPF & DMARC ExplainerExplain an SPF or DMARC record term by term and flag what will not work. ↗

MAC Address ToolConvert MAC notations, read the assignment bits, and derive the EUI-64 and link-local address. ↗

Port ReferenceSearch common TCP and UDP ports, what listens there, and the ones they are confused with. ↗

Subnet PlannerDivide a block into subnets by host count, around the allocations you already have. ↗

IPv6 ToolExpand, compress, and inspect IPv6 addresses, prefixes, and reverse DNS names. ↗

IP Range ConverterConvert address ranges to CIDR blocks and back, aggregate blocks, and find overlaps. ↗

Run → ComposeTurn a docker run command into a Compose service, with every flag it cannot translate reported. ↗

cURL ConverterRead what a curl command actually does, then convert it to JavaScript, Python, Go, Java, C#, PHP, Ruby, or Rust, in your browser. ↗

Request BuilderBuild an HTTP request locally and generate equivalent cURL, fetch, Python, or Go code without sending it. ↗

CSP InspectorParse, normalize, and review Content Security Policy directives with a local restrictive baseline. ↗

Header InspectorParse raw HTTP request or response headers locally and inspect repeated fields, caching, security, and CORS signals. ↗

HTTP StatusesSearch a canonical reference of HTTP status codes by number, family, and meaning entirely in your browser. ↗

HL7 v2 InspectorInspect, filter, and correlate HL7 v2 messages and acknowledgments locally in your browser. ↗

HL7 v2 DiffCompare two HL7 messages by field, component, repetition, and subcomponent locally. ↗

HAR InspectorOpen a browser HAR file locally to summarize requests, timings, sizes, and response details without uploading the archive. ↗

SVG ViewerInspect, format, and preview SVG source locally without executing it. ↗

Image ConverterConvert and resize PNG, JPEG, and WebP images locally with explicit quality and transparency handling. ↗

SVG ConverterConvert validated SVG source to PNG, JPEG, or WebP locally at exact pixel dimensions. ↗

Favicon ConverterBuild a real multi-size ICO and modern favicon ZIP package from one local image. ↗

Markdown ConverterConvert GitHub Flavored Markdown and sanitized HTML locally, with a safe rendered preview. ↗

Spreadsheet ConverterConvert CSV, TSV, XLSX, and tabular JSON files locally with explicit sheet handling and a bounded preview. ↗

PDF ToolkitMerge, extract, reorder, rotate, remove, and optionally shrink PDF pages locally in one bounded workspace. ↗

Images to PDFArrange PNG, JPEG, and WebP images into a locally generated PDF with explicit page sizing and fit. ↗

PDF to ImagesRender selected PDF pages to PNG or JPEG locally at an honest 1×, 2×, or 3× scale. ↗

ColorsPick a color or paste any CSS color value and convert it between common, perceptual, and modern color spaces locally. ↗

HTML EntitiesSearch every HTML named character reference and copy its forms locally. ↗

Unicode & EmojiSearch thousands of Unicode symbols and every emoji with copyable code points and UTF-8 forms. ↗

PunycodeConvert internationalized domain names between Unicode and ASCII Punycode locally. ↗

User-AgentParse a browser or client User-Agent string into readable local fields. ↗

robots.txtGenerate a deterministic robots.txt starter file from readable local rules. ↗

QR CodesGenerate QR codes for text, links, contact details, Wi-Fi, and messages in your browser. ↗

Snippet ImageTurn source code into a polished JPG or standalone HTML card locally. ↗

Color HarmonyPick a base color and generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes locally. ↗

XML FormatterFormat and validate XML locally without fetching external entities. ↗

SQL FormatterFormat SQL queries locally while preserving strings, comments, and parameters. ↗

YAML FormatterFormat and validate YAML locally while retaining YAML-specific syntax. ↗

JavaScript FormatterFormat and compact modern JavaScript locally without executing it. ↗

Reddit TextDraft desktop Reddit Markdown or Discord text with a local preview and character counter. ↗

chmod CalculatorTranslate Unix file permissions between octal, symbolic, and chmod command forms. ↗

Color ContrastCheck WCAG contrast ratios for foreground and background colors, including transparency. ↗

TOML FormatterParse and format TOML 1.0 locally with explicit syntax errors. ↗

XPath TesterEvaluate XPath 1.0 expressions against XML locally and inspect nodes, values, or paths. ↗

JSONPath TesterEvaluate JSONPath expressions against local JSON and inspect every matched path and value. ↗

Glob TesterTest minimatch glob patterns and ordered exclusions against a local list of paths. ↗

SemVer Range TesterCompare strict semantic versions and test them against npm-style ranges locally. ↗

CSS FormatterFormat and validate modern CSS locally while preserving strings, comments, URLs, and calc expressions. ↗

Cron BuilderBuild standard five-field Unix cron schedules from friendly presets or custom fields. ↗

ULIDGenerate cryptographically random ULIDs and inspect their timestamp and random components locally. ↗

LaTeX EquationsWrite LaTeX equations with insertion helpers, a live preview, and copy-ready wrappers. ↗

Resistor CodesDecode and encode resistor colour bands and common SMD markings. ↗

Ohm's LawSolve voltage, current, resistance, and power from any two known values. ↗

Voltage DividerCalculate loaded or unloaded divider voltage, currents, impedance, and power. ↗

Resistor NetworkTotal a resistor list in series or parallel with tolerance and power results. ↗

LED ResistorChoose the next preferred LED current-limiting resistor and inspect branch power. ↗

RC CalculatorCalculate RC time constant, filter cutoff, and charge/discharge thresholds. ↗

Unit ConverterConvert compatible mechanical, electrical, thermal, and data units with guided unit pickers. ↗

Base & BitsInspect binary, octal, decimal, hexadecimal, signed values, byte order, bitwise operations, floats, and characters. ↗

Animation SpritesheetRender a rigged FBX or GLB character into a PNG sprite atlas with optional frame metadata entirely in the browser. ↗

Mesh RetargeterRebuild a binary FBX mesh hierarchy with UE5, Unity-style, Mixamo, or custom bone names and download it locally. ↗

FBX RepairerRepair broken FBX texture paths across an asset pack and download a portable ZIP locally. ↗

Sprite SlicerSlice a regular PNG spritesheet into individual frames, preview playback, and download a local ZIP with frame coordinates. ↗

EXIF InspectorRead photo EXIF metadata locally: camera settings, timestamps, GPS coordinates, orientation, and recorded authorship. ↗

3D Asset InspectorInspect FBX or GLB meshes, materials, texture references, bones, and embedded animation clips without uploading the asset. ↗

OpenAPI ChangesCompare two OpenAPI documents locally and review removed operations, newly required inputs, and other contract changes. ↗

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Electronics tools