For debugging, inspection, and cleanup

Developer Tools

Use browser-based formatter, validator, JSON, SQL, regex, JWT, query-string, and hashing tools for fast debugging, cleanup, inspection, and copy-ready results.

44+ tools

8 developer workflow groups

Browser-based local processing

Formatters

Clean up dense code and structured text so it is easier to inspect, debug, and share.

JSON Formatter Format JSON online with readable indentation for APIs, configs, and copied payloads. JSONReadability YAML Formatter Clean up YAML for config review, deployment files, and structured text editing. YAMLConfig HTML Formatter Format markup and embedded snippets for editing, inspection, and reuse. HTMLSnippets CSS Formatter Reformat stylesheet code and minified CSS so you can review it line by line. CSSDebugging JavaScript Formatter Beautify bundled or dense JavaScript for debugging and manual inspection. JavaScriptInspection SQL Formatter & Beautifier Format MySQL, PostgreSQL, and BigQuery SQL so long queries are easier to review. SQLReview

Validators

Check structured text before it breaks a request, deploy, embed, or saved file.

JSON Validator Catch invalid JSON syntax before sending an API request or saving a config file. JSONSyntax YAML Validator Validate YAML before deployment, CI, or config handoff. YAMLDeploy XML Validator Check XML for feed, integration, and markup errors online. XMLFeeds HTML Validator Inspect HTML markup for structural issues before reuse or publishing. HTMLMarkup OpenAPI & Swagger Validator Validate OpenAPI and Swagger specs, then preview API docs from JSON or YAML. OpenAPISwagger

JSON tools

Handle messy JSON payloads, comparisons, and schemas without leaving the browser.

JSON Formatter Format JSON online with readable indentation for APIs, configs, and copied payloads. FormattingAPIs JSON Minifier Remove whitespace from JSON for smaller payloads, embeds, and transfers. PayloadsMinify JSON Diff & Merge Compare JSON files side by side and merge nested changes more safely. CompareMerge JSON Schema Generator Generate a schema from sample JSON to document structure and expected fields. SchemaSample data JSON Validator Catch invalid JSON syntax before sending an API request or saving a config file. ValidationErrors

Security & hashing

Generate hashes, inspect tokens, and verify values used in auth, signing, and debugging workflows.

Hash Generator Generate common hashes for quick comparisons, checksums, and debugging tasks. MD5SHA HMAC Generator Create HMAC values when testing API signing and shared-secret workflows. SigningAPI BCrypt Hash Generator Generate bcrypt hashes for login testing and auth-related development work. BCryptAuth BCrypt Hash Verifier Check whether a password candidate matches a bcrypt hash value. VerifyAuth JWT Decoder Decode JWT header and payload values for token inspection and debugging. JWTTokens

Network & URL

Inspect URLs, query parameters, and regex patterns that show up in real app and API work.

Query String Parser Parse URL query parameters so redirects, callback links, and requests are easier to read. Query stringsDebugging Query String Builder Build query strings safely from key-value pairs for links, APIs, and redirects. URLsBuilder URL Parser Split a URL into protocol, host, path, query, and fragment parts instantly. URLInspection Regex Tester Test regular expressions online with pattern, flags, and live match results. RegexPatterns cURL Converter Convert curl commands into fetch, axios, Python, Go, PHP, and more. cURLHTTP

Text tools

Tidy text, markdown, and lists when you need quick browser-side cleanup for content or code-adjacent work.

Markdown Editor & Preview Write markdown and preview the rendered output before publishing docs or README content. MarkdownPreview Diff Checker Compare two text blocks and spot line-level changes quickly. CompareText Word & Character Counter Count words, characters, lines, and paragraphs for content checks. CountsContent Case Converter Switch text between camelCase, snake_case, kebab-case, and more. NamingText Text Sorter & Deduplicator Sort lines, remove duplicates, and clean text lists before import or reuse. ListsCleanup Unix Timestamp Converter Convert Unix epoch seconds or milliseconds into readable dates and back again. EpochDatetime Time Now Show the current time, date, weekday, and UTC offset for a selected timezone. Current timeTimezone Timezone Converter Convert a local time between UTC, Europe, US, and Asia-Pacific timezones. TimezonesScheduling Date Difference Calculator Calculate the days, hours, and minutes between two date-time values. IntervalsPlanning Color Code Converter Paste a HEX, RGB, or HSL color and get the other formats instantly. HEXRGB/HSL Number Base Converter Convert values across binary, octal, decimal, and hexadecimal with bit length output. BinaryHex

Generators

Create useful developer values and placeholders without opening a separate utility app.

UUID / ULID Generator Generate random or sortable identifiers for APIs, databases, and logs. UUIDULID QR Code Generator Create QR codes from text or URLs and download them as PNG or SVG. QRPNG/SVG Lorem Ipsum Generator Generate placeholder copy for mockups, layouts, and documentation drafts. PlaceholderMockups Slug Generator Turn titles into URL-friendly slugs for blogs, CMS entries, and docs. URLsPublishing Cron Expression Generator Build cron expressions with examples for jobs, schedulers, and recurring tasks. CronScheduling JSON Schema Generator Generate a schema from sample JSON to document structure and expected fields. SchemaJSON CSS Gradient Generator Build linear or radial gradients visually and copy the CSS background value. CSSGradients

Reliability & uptime

Translate service targets into concrete downtime and budget numbers for ops, SRE, and SLA conversations.

SLA Uptime Calculator Turn 99.9% and 99.99% uptime targets into allowed downtime across common reporting windows. SLADowntime SLO Error Budget Calculator Calculate total, used, and remaining error budget from an SLO target and consumed downtime. SLOBudget