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Utileno
Free bilingual web tools that run in the browser — no signup, no file upload.
/compare/utilities
General-purpose indie utilities on IndieIndex — zip, UUID, webhooks, diagrams, password/OTP, and everyday browser tools. Curated highlights; not paid placement.
Highlighted
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IT Tools
Open-source collection of client-side developer utilities.
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Webhook.site
Instant unique URLs to inspect HTTP webhooks and requests.
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UUID Generator
Online UUID / GUID generator (v1 and v4).
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ezyZip
Simple online zip / unzip and archive compression in the browser.
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Lorem Ipsum
Classic Lorem Ipsum placeholder text generator.
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diagrams.net
Free browser diagram editor (draw.io) for flowcharts and architecture.
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ASCIIFlow
Draw ASCII diagrams in the browser.
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Bitwarden Password Generator
Free open-source password and passphrase generator from Bitwarden.
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Hoppscotch
Open-source API development and request playground.
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httpbin
HTTP request & response testing service for developers.
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goQR.me
Free QR code generator for URLs, vCards, and more.
Others in utilities
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비즈노 (bizno.net)
한국 사업자등록번호 조회·휴폐업 상태 확인 유틸.
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Branah Korean Keyboard
On-screen Hangul keyboard for typing Korean without a Korean IME.
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crontab guru
Plain-English explainer for cron schedule expressions.
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Desmos Scientific Calculator
Free scientific calculator in the browser from Desmos.
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Dillinger
Free online Markdown editor with live preview and export.
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Excalidraw
Open-source virtual whiteboard for hand-drawn diagrams.
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Archive Extractor (extract.me)
Online archive extractor — unzip zip/rar and related formats in the browser.
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Ezgif
GIF, video, and image converters in the browser.
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IndieIndex
Agent-native public product registry for indie software — search, llms.txt, queue-only submit.
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도로명주소 안내시스템 (juso.go.kr)
대한민국 공식 도로명주소·우편번호 검색 (행정안전부).
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LocalPDF
Edit, merge, OCR, and compress PDFs locally in the browser.
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OKLCH Color Picker
Interactive OKLCH color picker and hex/rgb/hsl converter.
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PDFLince
Privacy-first PDF toolkit — compress, merge, split, convert in-browser.
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Photopea
Photoshop-like photo and PSD editor that runs in the browser.
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SEQ Toolkit — Korean Culture
음력·로마자·한글 학습 등 한국 문화 도구 허브 (브라우저).
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Squoosh
Compress and convert images in the browser with WebAssembly.
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StackEdit
Open-source in-browser Markdown editor (offline-capable).
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Text Compare!
Paste two texts and see the difference — simple online diff.
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TinyPNG
Compress PNG, JPEG, WebP, and AVIF with a simple web upload.
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tldraw
Infinite canvas whiteboard you can open in a browser tab.
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Toolu
회원가입 없는 한국어 중심 무료 온라인 도구 모음.
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TOTP (danhersam)
Free browser TOTP / OTP authenticator code generator.
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UnitConverters.net
Large free unit conversion calculator set (length, area, volume, more).
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우리한글 (UriHangeul)
한글 글자수·자모·로마자·한영타자·전통단위 등 브라우저 한국어 도구 모음.
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YAMLlint
Free online YAML validator and reformatter.