Tools
Free developer tools
A small collection of free tools for developers and QA teams, with no signup and no cost. Built by the team behind BugMojo, the one-click bug capture platform.
rrweb Replay Viewer
Paste or upload an rrweb events JSON array and play it back in your browser. Scrub, pause, and inspect the DOM at any point. Runs entirely client-side, so nothing is uploaded.
Open tool →TemplatesBug Report Templates
Free, copy-paste bug report formats: Standard, Detailed QA, Jira-style, and GitHub-issue-style. Consistent structure so every report is reproducible.
Open tool →NetworkHAR File Viewer
Upload or paste a .har file to see a request waterfall (status, type, size, and timing) with error-only and by-type filters. Runs entirely in your browser.
Open tool →AuthJWT Decoder
Paste a JWT to decode its header and payload, with standard claims (exp, iat, nbf, iss, sub) shown in human-readable form. Client-side only, so the token never leaves your browser.
Open tool →FormatJSON Formatter & Validator
Format, minify, validate, and sort-key JSON with live error reporting and line/column hints. Everything runs in your browser.
Open tool →RegexRegex Tester
Test a regular expression against sample text with live match highlighting and numbered + named capture groups. Supports all JavaScript flags. Client-side only.
Open tool →EncodeBase64 Encoder / Decoder
Encode and decode Base64, UTF-8 safe, with an optional URL-safe variant. Runs entirely in your browser, so nothing is uploaded.
Open tool →URLURL Encoder / Decoder
Encode or decode URL components and parse a full URL into its protocol, host, path, query, and hash. Client-side only.
Open tool →URLQuery String Parser
Parse a URL or query string into an editable key/value table with repeated-key support, and rebuild the encoded string live. Client-side only.
Open tool →HashHash Generator
Compute SHA-1, SHA-256, SHA-384, and SHA-512 hex digests of any text via Web Crypto, updating live. Client-side only, so nothing is uploaded.
Open tool →GenerateUUID Generator
Generate cryptographically-random UUIDs (v4 and time-ordered v7) individually or in bulk, with copy-all and formatting options. Client-side only.
Open tool →TimeUnix Timestamp Converter
Convert Unix timestamps to human dates (UTC + local) and back, with seconds/milliseconds auto-detection and a live epoch clock. Client-side only.
Open tool →ScheduleCron Expression Explainer
Translate a cron expression into plain English and preview its next run times, with per-field validation. Runs entirely in your browser.
Open tool →ColorColor Converter
Convert colors between HEX, RGB, and HSL with a live swatch and native picker. In-house conversion math, no dependencies. Client-side only.
Open tool →DiffText Diff Checker
Compare two blocks of text line by line with added/removed highlighting and change counts, via an in-house diff. Client-side only.
Open tool →TextCase Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, and more, live. Client-side only.
Open tool →ConvertNumber Base Converter
Convert numbers between binary, octal, decimal, hex, and any base from 2 to 36 with BigInt precision. Client-side only.
Open tool →ConvertCSV to JSON
Convert CSV to JSON with quoted-field handling, configurable delimiter, header toggle, and optional type inference. Client-side only.
Open tool →TypeScriptJSON to TypeScript
Infer TypeScript interfaces from JSON: nested types, merged array shapes, optional keys, and unions. Client-side only.
Open tool →SecurityPassword Generator
Generate strong random passwords with crypto-grade randomness, configurable length and character sets, and a live strength meter. Client-side only.
Open tool →TextSlugify
Turn any text into a clean URL slug, with unicode/diacritic handling and configurable separator and casing. Client-side only.
Open tool →TextWord & Character Counter
Count words, characters, sentences, paragraphs, and lines with reading time and keyword density, live as you type. Client-side only.
Open tool →EncodeHTML Entity Encoder / Decoder
Encode or decode HTML entities (named and numeric) safely in your browser, with no injection surface. Client-side only.
Open tool →More tools coming soon. Have a request? Let us know.