{"slug": "show-hn-codekithub-free-browser-based-tools-files-never-leave-your-device", "title": "Show HN: CodeKitHub – Free browser-based tools, files never leave your device", "summary": "CodeKitHub launched a free, browser-based tool suite for developers and everyday tasks, featuring JSON formatting, text manipulation, encoding, and AI prompt libraries, all processing data locally without uploads or logins.", "body_md": "# Free Online Tools for Everyone\n\nFast, free and privacy-friendly tools for developers and everyday tasks. Everything runs in your browser — no login, no upload, no limits.\n\n## Categories\n\n[{ }](/en/json-tools/)\n\n### JSON Tools\n\nFormat, validate and work with JSON data.\n\n[Tt](/en/text-tools/)\n\n### Text Tools\n\nCount, compare and transform text.\n\n[<>](/en/encode-tools/)\n\n### Encode Tools\n\nEncode, decode and hash data.\n\n[⏱](/en/time-tools/)\n\n### Time Tools\n\nConvert timestamps and work with dates.\n\n[⚡](/en/generator-tools/)\n\n### Generator Tools\n\nGenerate UUIDs, hashes and more.\n\n[✦](/en/everyday-tools/)\n\n### Everyday Tools\n\nPasswords, QR codes, calculators and converters for daily life.\n\n[◎](/en/webmaster-tools/)\n\n### Webmaster Tools\n\nSEO and site-management utilities for webmasters and developers.\n\n[✧](/en/ai-tools/)\n\n### AI Tools\n\nCurated AI prompt libraries and utilities — no API calls, no cost, no login.\n\n[▣](/en/image-tools/)\n\n### Image Tools\n\nConvert and compress images — right in your browser, no upload.\n\n## Featured Tools\n\n[{ }](/en/json-formatter/)\n\n### JSON Formatter\n\nFormat, beautify, validate and minify JSON with instant error checking.\n\n[<>](/en/base64-encoder/)\n\n### Base64 Encoder / Decoder\n\nEncode text to Base64 or decode it back — UTF-8 safe, instant.\n\n[⚡](/en/uuid-generator/)\n\n### UUID Generator\n\nGenerate cryptographically secure UUID v4 identifiers, in bulk.\n\n[⏱](/en/timestamp-converter/)\n\n### Timestamp Converter\n\nConvert Unix timestamps to dates and back, with a live epoch clock.\n\n[✦](/en/password-generator/)\n\n### Password Generator\n\nGenerate strong random passwords with custom length and characters.\n\n[✦](/en/qr-code-generator/)\n\n### QR Code Generator\n\nCreate QR codes with live preview and PNG download — no watermark.\n\n[▣](/en/image-compressor/)\n\n### Image Compressor\n\nCompress JPG/PNG/WebP images locally — no upload, no limits.\n\n[✧](/en/student-ai-prompts/)\n\n### Student AI Prompt Library\n\nCategorized AI prompts for students — one-click copy, ready to use.\n\n[✧](/en/teacher-ai-prompts/)\n\n### Teacher AI Prompt Library\n\nCategorized AI prompts for teachers — one-click copy, ready to use.\n\n[◎](/en/robots-txt-generator/)\n\n### Robots.txt Generator\n\nGenerate robots.txt — presets for AI crawlers, custom paths, sitemap.\n\n## All Tools\n\n[{ }](/en/json-formatter/)\n\n### JSON Formatter\n\nFormat, beautify, validate and minify JSON with instant error checking.\n\n[<>](/en/base64-encoder/)\n\n### Base64 Encoder / Decoder\n\nEncode text to Base64 or decode it back — UTF-8 safe, instant.\n\n[⚡](/en/uuid-generator/)\n\n### UUID Generator\n\nGenerate cryptographically secure UUID v4 identifiers, in bulk.\n\n[⏱](/en/timestamp-converter/)\n\n### Timestamp Converter\n\nConvert Unix timestamps to dates and back, with a live epoch clock.\n\n[<>](/en/url-encoder/)\n\n### URL Encoder / Decoder\n\nPercent-encode or decode URLs and query parameters correctly.\n\n[⚡](/en/md5-generator/)\n\n### MD5 Generator\n\nGenerate MD5, SHA-1 and SHA-256 hashes from any text instantly.\n\n[Tt](/en/word-counter/)\n\n### Word Counter\n\nLive word, character, sentence and reading-time counts as you type.\n\n[Tt](/en/regex-tester/)\n\n### Regex Tester\n\nTest regex patterns with live highlighting and capture groups.\n\n[⚡](/en/color-converter/)\n\n### Color Converter\n\nConvert colors between HEX, RGB and HSL with live preview.\n\n[Tt](/en/text-diff/)\n\n### Text Diff\n\nCompare two texts and see added/removed lines highlighted.\n\n[✦](/en/password-generator/)\n\n### Password Generator\n\nGenerate strong random passwords with custom length and characters.\n\n[✦](/en/qr-code-generator/)\n\n### QR Code Generator\n\nCreate QR codes with live preview and PNG download — no watermark.\n\n[✦](/en/rick-roll-qr-code/)\n\n### Rick Roll QR Code\n\nA ready-to-print QR code that rickrolls whoever scans it.\n\n[✦](/en/age-calculator/)\n\n### Age Calculator\n\nYour exact age in years, months, days — plus next-birthday countdown.\n\n[✦](/en/percentage-calculator/)\n\n### Percentage Calculator\n\nX% of a number, what percent X is of Y, and percentage change.\n\n[✦](/en/date-calculator/)\n\n### Date Calculator\n\nFind the days between two dates, or add/subtract days, weeks, months and years.\n\n[✦](/en/loan-calculator/)\n\n### Loan Calculator\n\nMonthly payment and total interest for a fixed-rate loan.\n\n[✦](/en/unit-converter/)\n\n### Unit Converter\n\nLength, weight, temperature, area, volume and speed conversions.\n\n[✦](/en/case-converter/)\n\n### Case Converter\n\nConvert text to UPPER, lower, Title, camelCase, snake_case and more.\n\n[✦](/en/random-number-generator/)\n\n### Random Number Generator\n\nRandom numbers in any range — bulk, unique draws, sorting.\n\n[▣](/en/image-compressor/)\n\n### Image Compressor\n\nCompress JPG/PNG/WebP images locally — no upload, no limits.\n\n[▣](/en/png-to-jpg/)\n\n### PNG to JPG Converter\n\nConvert PNG images to JPG locally, with batch support.\n\n[▣](/en/jpg-to-png/)\n\n### JPG to PNG Converter\n\nConvert JPG images to lossless PNG locally, batch supported.\n\n[▣](/en/webp-to-jpg/)\n\n### WebP to JPG Converter\n\nConvert WebP images to universally compatible JPG, locally.\n\n[▣](/en/heic-to-jpg/)\n\n### HEIC to JPG Converter\n\nConvert iPhone HEIC photos to JPG — private, on your device.\n\n[▣](/en/image-resizer/)\n\n### Image Resizer\n\nResize images by pixel width or percent — aspect ratio kept.\n\n[▣](/en/jpg-compressor/)\n\n### JPG Compressor\n\nShrink JPG/JPEG files with adjustable quality — no upload.\n\n[▣](/en/png-compressor/)\n\n### PNG Compressor\n\nCompress PNGs via palette quantization — transparency preserved.\n\n[▣](/en/svg-converter/)\n\n### SVG Converter\n\nRasterize SVG vectors to PNG/JPG at any resolution, locally.\n\n[▣](/en/gif-compressor/)\n\n### GIF Compressor\n\nShrink animated GIFs: colors, scale, frame-drop — no upload.\n\n[✧](/en/student-ai-prompts/)\n\n### Student AI Prompt Library\n\nCategorized AI prompts for students — one-click copy, ready to use.\n\n[✧](/en/teacher-ai-prompts/)\n\n### Teacher AI Prompt Library\n\nCategorized AI prompts for teachers — one-click copy, ready to use.\n\n[✧](/en/school-staff-ai-prompts/)\n\n### K-12 School Staff AI Prompt Library\n\nAI prompts for principals, HR, counselors, compliance, facilities and more — one-click copy.\n\n[✧](/en/college-student-ai-prompts/)\n\n### College Student AI Prompt Library\n\nAI prompts for essays, exams, research, time management and career prep — one-click copy.\n\n[Tt](/en/text-cleaner/)\n\n### Text Cleaner\n\nRemove duplicate lines, blank lines and extra spaces — all in one tool.\n\n[Tt](/en/chinese-converter/)\n\n### Chinese Converter\n\nConvert Simplified/Traditional Chinese with regional standard support.\n\n[Tt](/en/pinyin-converter/)\n\n### Chinese to Pinyin Converter\n\nChinese to Pinyin, 4 formats, smart multi-reading detection.\n\n[✦](/en/qr-code-decoder/)\n\n### QR Code Decoder\n\nDecode a QR code from an uploaded image — local, no app needed.\n\n[◎](/en/robots-txt-generator/)\n\n### Robots.txt Generator\n\nGenerate robots.txt — presets for AI crawlers, custom paths, sitemap.\n\n[✦](/en/rmb-uppercase/)\n\n### Chinese Numeral Currency Converter\n\nConvert numeric amounts to Chinese uppercase currency format.\n\n[✦](/en/check-amount-to-words/)\n\n### Check Amount to Words Converter\n\nConvert a numeric amount into the words format required on a check.\n\nNo tools found.", "url": "https://wpnews.pro/news/show-hn-codekithub-free-browser-based-tools-files-never-leave-your-device", "canonical_source": "https://codekithub.com/en/", "published_at": "2026-07-19 06:32:30+00:00", "updated_at": "2026-07-19 06:50:59.785792+00:00", "lang": "en", "topics": ["developer-tools", "ai-tools"], "entities": ["CodeKitHub"], "alternates": {"html": "https://wpnews.pro/news/show-hn-codekithub-free-browser-based-tools-files-never-leave-your-device", "markdown": 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