Developer Tools
76 tools76 liveFree developer tools for JSON, YAML, XML, code formatters, QR codes, and reference utilities. Browse 76 browser-based utilities on FindMeTool, format JSON and YAML, beautify HTML/CSS/JS, preview Markdown, generate QR codes, count words, and convert Unix timestamps. Most utilities run locally in your browser. No signup or install required.
Developer tutorial
Learn how JSON formatters, YAML validators, code beautifiers, text utilities, and reference pages fit together on FindMeTool. Practical workflows for debugging APIs, cleaning configs, and shipping readable snippets.
JSON tools
Free browser-based JSON tools for formatting, validating, minifying, comparing, and sorting keys.
JSON Formatter
Format, pretty-print, and minify JSON online for free. Beautify API responses and config files in your browser - nothing is sent to a server.
DeveloperJSON Syntax Checker
Check and validate JSON syntax online. Free browser tool to find missing commas, quotes, and brackets with clear error messages.
DeveloperJSON Minifier
Free JSON minifier to compress API payloads and request bodies by removing whitespace. Smaller JSON for smaller payloads.
DeveloperJSON Diff
Free JSON diff tool to compare API responses, request/response pairs, and configuration files side by side.
DeveloperJSON Sort Keys
Free tool to sort JSON object keys alphabetically for cleaner comparisons and consistent configuration files.
DeveloperJSON to YAML
Convert JSON to YAML online for free. Turn API responses and configuration objects into readable YAML instantly.
DeveloperTOML tools
Format, validate, convert, diff, and sort TOML configuration files in your browser.
TOML Formatter
Free TOML formatter to beautify Cargo, pyproject, and config files with consistent spacing. Browser-based.
DeveloperTOML Validator
Free TOML validator for TOML 1.0 syntax with clear error messages. Live checks as you paste in your browser.
DeveloperTOML ↔ JSON Converter
Free TOML ↔ JSON converter hub. Convert TOML to JSON on this page, or open the JSON to TOML long-tail page for the reverse direction.
DeveloperTOML Diff
Free TOML diff tool to compare two config files and highlight changes. Ignores formatting-only edits.
DeveloperTOML Sort Keys
Free TOML sort keys tool to alphabetize keys and tables for cleaner git diffs. Browser-based.
DeveloperEncoding & decoding
Base64, URL, HTML entity, hex, binary, and ASCII encoding utilities for APIs, links, and debugging.
Base64 Encoder
Free Base64 encoder online. Turn text into Base64 strings instantly in your browser. No upload required.
DeveloperBase64 Decoder
Free Base64 decoder online. Turn Base64 strings back into readable text instantly in your browser.
DeveloperURL Encoder
Free URL encoder online. Percent-encode query strings and special characters for links and APIs.
DeveloperURL Decoder
Free URL decoder online. Decode percent-encoded strings from links and query parameters instantly.
DeveloperHTML Entity Converter
Free HTML entity converter online. Escape special characters to entities or decode entities back to plain text in your browser.
DeveloperHex Encoder/Decoder
Free hex encoder and decoder online. Convert UTF-8 text to hex bytes and decode hex strings back to text in your browser.
DeveloperBinary Text Converter
Free binary text converter online. Encode UTF-8 text to spaced 8-bit binary groups and decode binary back to text.
DeveloperASCII Hex Converter
Free ASCII to hex converter online. Map characters to spaced hex code points and decode hex back to text.
DeveloperASCII Binary Converter
Free ASCII to binary converter online. Map characters to 8-bit binary codes and decode binary back to text.
DeveloperASCII Table
Free ASCII table online. Look up decimal, hex, binary, and character values for standard ASCII codes 0 through 127.
DeveloperRegex
Test regular expressions against sample text with flags and capture groups.
YAML, XML & SQL
Format configuration, data, and query files in your browser.
YAML Formatter
Free YAML formatter to pretty-print configuration and config files with consistent indentation. Browser-based.
DeveloperYAML Syntax Checker
Validate YAML syntax and identify parsing errors online. Free browser checker for configs and config files.
DeveloperYAML to JSON
Convert YAML to JSON online for free. Turn configuration and Kubernetes-style YAML into JSON instantly.
DeveloperXML Formatter
Free XML formatter to pretty-print API responses and documents. Beautify minified XML in your browser.
DeveloperXML Validator
Free XML validator online. Paste XML to check well-formed syntax in your browser. No signup.
DeveloperSQL Formatter
Free SQL formatter to pretty-print and beautify database queries for debugging and code review. Browser-based.
DeveloperInspect & parse
Paste-only inspectors for JWTs, HTTP headers, cookies, User-Agent strings, Unicode, and robots.txt rules.
JWT Inspector
Free JWT inspector online. Paste a token to view header, payload, and exp timing in your browser. Signatures are not verified.
DeveloperHTTP Header Inspector
Free HTTP header inspector. Paste raw response or request headers to list fields in your browser. Does not fetch URLs.
DeveloperCookie Inspector
Free cookie inspector online. Paste Cookie or Set-Cookie header text to read names, values, and attributes in your browser.
DeveloperUser-Agent Parser
Free User-Agent parser online. Paste a UA string for length and heuristic token notes in your browser.
DeveloperUnicode Inspector
Free Unicode inspector online. See code points for pasted text and common invisible characters in your browser.
DeveloperInvisible Character Detector
Free invisible character detector online. Find zero-width spaces and bidi controls in pasted text and copy a cleaned version in your browser.
Developerrobots.txt Tester
Free robots.txt tester online. Paste robots.txt content to read groups and sitemap lines in your browser. Does not fetch URLs.
DeveloperJSON Schema Validator
Free JSON Schema validator online. Paste a schema and JSON instance separated by --- to see match results in your browser.
DeveloperHash digests
Generate MD5, SHA-1, SHA-256, and SHA-512 hex digests from pasted text in your browser.
MD5 Hash Generator
Free MD5 hash generator online. Paste text to get an MD5 hex digest in your browser.
DeveloperSHA-1 Hash Generator
Free SHA-1 hash generator online. Paste text for a SHA-1 hex digest in your browser.
DeveloperSHA-256 Hash Generator
Free SHA-256 hash generator online. Paste text for a SHA-256 hex digest in your browser.
DeveloperSHA-512 Hash Generator
Free SHA-512 hash generator online. Paste text for a SHA-512 hex digest in your browser.
DeveloperGenerators
Create QR codes from URLs or text for sharing links on posters, packaging, and business cards.
Text
Case conversion, counts, line cleanup, character frequency, prompt stats, chunking, and reading-time estimates.
Case Converter
Free case converter for camelCase, snake_case, kebab-case, PascalCase, and uppercase. Rename identifiers instantly.
DeveloperWord Counter
Free word counter for essays, blog posts, and Markdown. See word and character counts instantly in your browser.
DeveloperCharacter Counter
Free character counter online, count characters, words, and lines for social limits and forms.
DeveloperDuplicate Line Remover
Free duplicate line remover. Paste text and delete repeated lines instantly in your browser, no signup.
DeveloperRemove Empty Lines
Free remove empty lines tool. Delete blank lines from pasted text instantly in your browser.
DeveloperCharacter Frequency Analyzer
Free character frequency analyzer. Count how often each character appears in text with percentages, in your browser.
DeveloperPrompt Word & Character Counter
Free prompt word and character counter. Paste a system or user prompt and see text stats instantly in your browser, informational counts only.
DeveloperText Chunking Calculator
Free text chunking calculator. Split long text by characters, words, or paragraphs into numbered draft chunks in your browser.
DeveloperReading Time Calculator
Free reading time calculator for articles and blog posts. Estimate minutes to read from word count at your WPM speed.
DeveloperCode formatters
Beautify Markdown, HTML, CSS, and JavaScript in the browser.
Markdown Preview
Free Markdown preview to render README files and documentation before publishing. Check GitHub-style Markdown instantly.
DeveloperMarkdown Table Generator
Free Markdown table generator. Paste CSV or TSV rows and get a pipe table for README files, free in your browser.
DeveloperHTML Formatter
Free HTML formatter to pretty-print and beautify minified HTML documents for debugging. Browser-based.
DeveloperCSS Formatter
Free CSS formatter to beautify minified stylesheets and pretty-print CSS for debugging. Instant browser results.
DeveloperJavaScript Formatter
Free JavaScript formatter to pretty-print and beautify minified JS for debugging. Runs in your browser.
DeveloperColor Space Converter
Free HEX RGB HSL CMYK color converter online. Convert between color spaces instantly in your browser for CSS and print.
DeveloperCloud & container sizing
Technical vCPU, RAM, GPU VRAM, Kubernetes, CDN egress, and Docker host budget calculators. No pricing.
Cloud Server Sizing Calculator
Free Cloud Server Sizing Calculator online, cloud server sizing calculator in your browser with instant results. Private, no signup, no upload. Part of our Developer tool collection.
DeveloperGPU Memory Calculator
Free GPU VRAM calculator for LLM inference, training, video transcode, and CUDA jobs. Estimate GPU and host RAM needs. No pricing.
DeveloperKubernetes Resource Calculator
Free Kubernetes cluster calculator. Learn what Kubernetes is at a high level, size CPU and memory requests, and estimate worker nodes for any Kubernetes cluster.
DeveloperCDN Bandwidth Calculator
Free CDN Bandwidth Calculator online, cdn bandwidth calculator in your browser with instant results. Private, no signup, no upload. Part of our Developer tool collection.
DeveloperDocker Resource Calculator
Free Docker host resource calculator. Sum container CPU and memory limits, compare to host capacity, and see overcommit warnings.
DeveloperReference & time
HTTP status code lookup and Unix timestamp conversion.
HTTP Status Codes
Free HTTP status code reference for 404, 500, 401 unauthorized, 429 rate limit, and other 1xx–5xx responses. Search by number or keyword.
DeveloperUnix Timestamp Converter
Free Unix timestamp converter for epoch ↔ date. Convert timestamps to UTC/readable time or dates back to Unix time.
DeveloperMore developer tools
Additional utilities in the developer catalog.
Number Base Converter
Free number base converter for binary, octal, decimal, and hex. Convert integers in your browser with optional 0b, 0o, and 0x prefixes.
DeveloperROT13 Converter
Free ROT13 converter online. Rotate letters A-Z by 13 places for puzzles and spoilers in your browser. Not encryption.
DeveloperULID Generator
Free ULID generator online. Create sample sortable identifiers in your browser for logs, tests, and prototypes. No signup.
DeveloperRandom Color Generator
Free random color generator online. Get random HEX, RGB, and HSL values with a live swatch preview in your browser.
DeveloperRandom Emoji Picker
Free random emoji picker online. Get a surprise emoji for chat, games, and prompts. Copy in one click, runs in your browser.
DeveloperText Reverser
Free text reverser online. Flip character order instantly for puzzles, palindrome checks, and quick string experiments in your browser.
DeveloperSlug Generator
Free slug generator online. Turn titles into lowercase hyphenated path segments for blog posts, docs, and filenames in your browser.
DeveloperLine Number Formatter
Free line number formatter online. Add line numbers to text or strip numbering prefixes for code snippets and notes in your browser.
DeveloperTab to Spaces Converter
Free tab to spaces converter online. Expand tabs to spaces or compress leading spaces to tabs with a 2, 4, or 8 space tab width in your browser.
DeveloperLevenshtein Distance
Free Levenshtein distance calculator online. Count minimum single-character edits between two strings for coursework and demos in your browser.
DeveloperCron Expression Parser
Free cron expression parser that explains schedules in plain English. Explains cron schedules in plain language.
DeveloperCron Expression Builder
Free cron expression builder for daily jobs, weekday schedules, every-minute runs, and monthly tasks. Generate cron online.
DeveloperDeveloper tools FAQ
Are FindMeTool developer tools free?
Yes. Formatters, QR code generation, text utilities, and reference tools are free with no signup or usage limits.
Do developer tools run in the browser?
Most utilities process input locally in your browser. No signup or server upload is required for standard formatters and reference pages.
What kinds of developer tools are available?
JSON/YAML/XML formatters, HTML/CSS/JavaScript beautifiers, Markdown preview, QR code generation, word and reading-time tools, HTTP status reference, and Unix timestamp conversion.
How many developer tools does FindMeTool offer?
FindMeTool currently offers 76 developer utilities including formatters, generators, and reference tools.