Skip to main content
Dev Request
Solutions
Portfolio
News
Inquiry
If we need it, we build it first.
We don't wait for requests. We plan, develop, and experiment with the technology and tools the world needs to change everyday life.
Owned Solutions
0
Tech Patents
0
Events Attended
0
Awards
0wins
SOCIAL
IMPACT
Beyond technology development (Dev), we plant five social values (Five) into the world.DevFive is an impact-tech startup that improves digital accessibility through innovative technology,
expands educational opportunities, and creates sustainable value
to contribute to the growth of more people.
View Company Profile
Real-time Korean Braille Translation LibraryAn open-source Korean braille translation library built on Rust.
It fully supports the 2024 revised braille rules and dramatically improves digital information accessibility for visually impaired users.
Visit Now
braillify — Test Case page (desktop monitor & mobile mockup) Screen: the Test Case page on a monitor, with the mobile view of the same page on the left Top GNB - Logo: braillify. - Docs / ● Test Cases / About Team - (right icons) GitHub · Discord · Chat · Light mode Test Cases - Test Cases · Total 2,064 · Passed 2,037 · Failed 27 (99%) · + - All test cases are based on the 2024 revised Korean Braille regulations. Category tabs - Hangul · Math · Science · Music · Western · Foreign languages · IPA · Corpus - ☐ Show only failed cases - (right) List view ⇄ Table view toggle · ‹ Expand table of contents Hangul - Hangul · Total 1,487 · Passed 1,487 · Failed 0 (100%) · + - (sub) Passed 13 · Failed 0 (100%) · + - When the 14 basic consonants are used as an initial sound, they are written as follows. Result table Example Answer Result Pass/Fail ri (braille) (braille) Pass (correct) bi (braille) (braille) Pass (correct) …deoji (braille) (braille) Pass (correct) …koder (braille) (braille) Pass (correct) …so (braille) (braille) Pass (correct) …ri (braille) (braille) Pass (correct) Mobile view (left) - Logo: braillify. - ☰ Menu - Test Cases · Total 2,064 · Passed 2,037 · Failed 27 (99%) · + - All test cases are based on the 2024 revised Korean Braille regulations. - List view ⇄ Table view toggle - Tabs: Hangul · Math · Science · Music · Western - ☐ Show only failed cases · Expand table of contents ⌃ - Hangul · Total 1,487 · Passed 1,487 · Failed 0 (100%) · + - Clause 1 · Passed 13 · Failed 0 (100%) · + - When the 14 basic consonants are used as an initial sound, they are written as follows. - 1 · Example: geori · Answer: (braille) · (pass check)
Touching Memory
Selected for the 2026 Korea Employment Agency for Persons with Disabilities Assistive Technology R&D ProgramSelected for the 2025 Software Maestro Sustainable Growth ProgramSelected as Best Performer in the Pre-Startup Package
An Intuitive Web-Based Braille EditorA web-based braille editing tool that lets anyone create braille documents with ease.
No complex installation required — translate and edit braille instantly in the browser.
Coming Soon
Screen: a document editor on a monitor (left: Hangul page / right: braille conversion page), with the mobile view of the same editor on the left Top bar - ☰ · The file name is shown here · ⚙ - (right tools) Format icons / A / Align / ▮▮ / − 100% + / Undo ↺ ↻ / Share Left sidebar (tabs) - Text (T) - Elements - Background - Comments - Document Text panel - + Add basic text box - Text styles - Add heading - Add subheading - Add body text Editing canvas - Page 1 (Hangul): Hello - Page 2 (braille conversion): (braille notation) Right page panel - Pages - 1 · Page - 2 · Page - + New page Mobile view (left) - 09:41 - ☰ · Format · A · Align · ▮▮ · 100% · ↺ ↻ - Page 1: Hello - Page 2: (braille notation) - Bottom tabs: Text(T) · Elements · Background · Comments · Document
01OPEN
SOURCE
Devup UI — Main Landing Hero Screen: Devup UI landing page top hero (left: copy/CTA, right: glass texture 3D graphics) Top GNB - Logo: Devup UI - Docs / Components / Showcase / Team / Storybook - (Right-hand icon) GitHub · Discord · Chat · Dark mode Hero Copy - Zero Config - Zero FOUC - Zero Runtime - CSS in JS Preprocessor - Building the Future of CSS-in-JS - Analyze all possible scenarios at the fastest speed and style with optimal performance. - Get started Social indicators - Star · 359 - Sponsor
Devup-UI
2025
DevFive's in-house React-based UI component library. Built to rapidly apply a consistent design system across all projects, it is publicly available alongside a Discord community.
VESPERA
Vespera
2026
DevFive's core technology: a Rust-based, zero-config OpenAPI engine. It maximizes backend development productivity by providing folder-based automatic route discovery and compile-time schema extraction.
VESPERTIDE
Vespertide
A library that defines database schemas in JSON and YAML formats, and automatically generates migration files. It streamlines complex database management processes, making them intuitive and efficient.
02TECH
FOR ALL
View Builder/WebApp Factory — Administrator Dashboard Screen: Statistics Dashboard (left side menu + right indicator card/chart/table) Left Sidebar - Logo: (W mark) - ID Hong Gildong. test@devfive.kr - Main Dashboard - Manage My Apps + - FREE View Builder/Web App Use - PRO · Devite Editorial Office & Console: Long Texts Omitted... - ULTIMATE · Meag test - View the full list of apps - My Page - Modifying Membership Information - Payment method management - Payment history - Notice - Log out - Setting up a top bar - Duration: May 1, 2025 – May 28, 2025 ▾ - May 28, 2025, 10:00 a.m - Register for a new app ## tab - Full App, View Builder/Widget App, DevTive Edit & Console… · 유어테스트 · UTIL SUPPORT · Youth List · Festa Guard indicator card Increase/decrease item value Total number of users 6,509 ▲ 532 (50.2%) 4,421 active users ▲ 232 (5.2%) Number of new generations 1,425 ▲ 232 (5.2%) Deviation rate 24% ▼ 2% 42 errors ▼ 4 cases (2%) Trends in number of users (line chart) - Full / Swipe Toggle - X-axis: 05-01 · 05-05 · 05-09 · 05-13 · 05-17 · 05-22 · 05-28 Sales Statistics (Line Charts) - Full / Swipe Toggle - X-axis: 05-01 · 05-05 · 05-09 · 05-13 · 05-17 · 05-22 · 05-28 Percentage of Active Users (DAU/MAU) Date Daily Active Users (DAU) Monthly Active Users (MAU) Active Users Ratio (DAU/MAU) 2025-05-28 1,221 people 5,710 people 23% 2025-05-21 2,432 6,140 39% 2025-05-14 1,540 people 5,782 people 27% 2025-05-01 2,233 people 6,312 people 44%
Web App Factory
2023, Web App Builder, Patented
A magical service that auto-generates iOS and Android apps with just one URL. Launch your own app instantly, regardless of your development experience.
Security Book — Main Landing Hero Screen: Security Case Platform Landing Hero (left: copy/marker, right: lock/shield/checklist 3D illustration) Top GNB - Logo: Security Book - Please enter search terms such as full ▾, company name, and service name. (search) - (Right) Register case · Dark mode Hero Copy - Is your information secure? - The root cause of repeated security incidents and - It contains solid precautions to protect tomorrow. - Identify the causes of security incidents through real-world events and data - You can see practical precautions for individuals and businesses. Indicator Item Value Total number of accidents 1,540+ 128 million cumulative damages+ Corporate average loss of 4.53 billion Preventable rate 92%
Security Log
2026
A platform that analyzes and archives the root causes of complex IT security incidents, such as hacking and data leaks. It provides practical, easy-to-understand preventative measures to help everyone enjoy a safe digital environment.
03R&D LAB
YOURTEST — Main Landing (Psychological Test Platform) Screen: YOURTEST Landing Top (Hero Banner + Notice + Latest Test List) Top GNB - Logo: Your TEST - (Right) Light Mode Hero Banner - What if I were a YouTuber? - Which YouTuber type would suit me? - Start the test - (Right) 3 YouTube video cards illustration · Play bar 1:35 / 3:46 Notice - Announcement Hello, this is your test. - The View All Announcement › the latest test - (Thumbnail 3 types: Person/drama image 2 types and game controller illustration 1 type)
YourTest
2024
A psychological and personality test platform where users can instantly participate and share results without complex sign-ups. Future updates will introduce features allowing users to create and distribute their own tests.
UTIL SUPORT — Utility Collection Main Page Screen: UTIL SUPPRT Landing (Top GNB + Category Tab + UTIL Card Grid) Top GNB - Logo: UTIL SUPPORT - (Search window) - (Right) Light Mode, Favorite, ☰ Category tab - Overall, fun & convenience, basic life, financial calculator, file conversion, design tool, marketing specialization, developer tool Fun & Convenience Tool Description Are you thinking about choosing an OX? Press the Decide button. The results of O or X will be randomly determined. It is a ladder game that allows you to draw winners by entering the winner and the winner of the ladder game. Roulette / Drawer This is a drawing tool in the form of a spinning plate that randomly selects the desired item. Your test is fun. Enjoy various tests on your test, full of tests. Special English Text Generator A site where you can generate special character English texts that can be used on SNS, etc. Try It Lunch menu recommendation. What's today's lunch menu? Press the recommendation button! Synthesizing Emojis A site where you can create new images or images by synthesizing emojis. It is a site that collects emoticons that can be used on SNS, such as special emoticons collection emojis, Isgummit, and Fancy fonts, so that you can find them at once. a basic life Tool Description Character count (character count tool) Spell Checker (Spell Check Tool) Text Sorting Tool (Text Sorting Tool) D-day Calculator (D-day Calculator Tool)
Util Support
2025, Web Utility
A collection of useful tools accessible directly from your browser. It will soon evolve into a productivity community where professionals can share references and bookmarks.
Moazip Decode — File name compatible converter Screen: MacOS → Window File Name Compatible Conversion (ZIP File List & Conversion UI) a top bar - 로고: Moazip Decode - MacOS → Window File Name Compatible Translator - (Right) Light Mode / Language File list - name change.ZIP · 4 file ▾ · 48 KB · × - name change.ZIP · 4 file ▾ (error) · 50 KB · × - (Folder Tree) - c ㅑ = %$# - c ㅑ = %$# - c ㅑ = %$#.jpg · 12 KB - c ㅑ = %$#.png · 12 KB - c ㅑ = %$#.pdf · 12 KB (error) - name change.ZIP · 4 file ▾ · 50 KB · × - name change.ZIP · 4 file ▾ · 50 KB · × Bottom button - + Add files and initialize ↻ - To convert all
Moa-ZIP
2026, macOS App, Utility
A dedicated macOS utility app that completely resolves the notorious file name corruption issue (NFD/NFC encoding mismatch) when opening Mac-compressed files on Windows. It perfectly prevents character separation across Korean, Chinese, Japanese, and other affected languages.
DEV ONE STEP
Dev One Step - IT NEWS
2026, IT News
A curation service that gathers scattered IT news in one place at a glance. It will expand into a builder platform, allowing anyone to easily create their own news website using pre-made templates.
CJK WORD BREAK — Introduction to the plug-in Screen: Introduction of Korean, Chinese and Japanese line-up plug-in (before → CLICK → after comparison) Header - Korea-China-Japan Line Plug-in, Korea-Japan 換 插件, and Korea-Japan 改 プラグイン - CJK WORD BREAK Comparative Example Korean - Before: Twinkle Twinkle Little Star shines beautifully. Twinkle Twinkle Little Star shines beautifully in the east sky and the west sky. - CLICK! → - After: Twinkle Twinkle Little Star shines beautifully. Twinkle Twinkle Little Star shines beautifully in the east sky and the west sky. Chinese - Before: 一闪一闪亮晶晶，满天都是小星星。挂在天空放光明，好像许多小眼睛。一闪一闪亮晶晶，满天都是小星星。 - CLICK! → - After: 一闪一闪亮晶晶，满天都是小星星。挂在天空放光明，好像许多小眼睛。一闪一闪亮晶晶，满天都是小星星。 Japanese language - Before: さくらさくら、野山も里も見わたす限り。かすみか雲か、朝日ににおう。さくらさくら、花ざかり。 - CLICK! → - After: さくらさくら、野山も里も見わたす限り。かすみか雲か、朝日ににおう。さくらさくら、花ざかり。
CJK Word Break
2025, Figma Plugin, Design Tool
A Figma plugin that cleanly applies word-level line breaks for Chinese, Japanese, Korean (CJK), and Thai text. It boosts workflow efficiency by bridging the gap between design mockups and actual development environments.
Threads Country Badge — Introduction to Chrome Extensions Screen: Threads Country Badge Landing (left: copy/option, right: Threads feed browser mockup) Left Panel - 로고: Threads Country Badge - Available in the Chrome Web Store - See country context at a glance - Adds inline country badges beside authors in Threads feeds and replies. Badging Options - Flag only - Country only - Flag + country Right Browser Mockup (threads.net ) - 탭: Threads - 좌측 메뉴: Home · Search · New thread · Activity · Notifications · Profile · More Feed User Country Content sarah.kim South Korea Sunny morning walks. Nothing beats a good coffee and fresh air to start the day. james.o United States Just finished a great book on productivity. Highly recommend it! sofia.lu Brazil Fim de semana perfeito com amigos e boa comida. Gratidão! arjun.dev India Replying to @sofia.lu — That sounds amazing! Where did you go? clara.meier Germany Berlin never disappoints. Always something new to discover. Bottom Badge - Privacy first · No data collection. 100% local.
Threads Country Badge
2026, Chrome Extension
A Chrome extension that intuitively displays a nationality badge next to usernames on the global social platform, Threads. We are experimenting with new ways to foster connections within the global community.

Take the for your business,

All you need is an idea. From the first consultation to launch, DevFive is by your side.
Contact Us Now
Quick Inquiry