Redefining Pure Experience,
Building High-Efficiency Tools
From developer-first zero-CORS API desktop client to multi-platform watermark-free video & photo downloaders, yokiasoft is dedicated to local-first privacy, sub-second launch, and zero bloat.
Relay API Client
Version 1.3.0 · Windows Platform
Say goodbye to bloated legacy clients and forced cloud sign-ins. Powered by native sockets, Relay naturally bypasses browser CORS restrictions while keeping all API configs and history 100% local.
Supports Windows 10 / 11 (64-bit) · Latest v1.3.0 · Size ~75 MB
Say Goodbye to Bloat & Cloud Lock-in, Embrace Pure Speed
Unlike bulky legacy API tools, Relay delivers a lightning-fast experience with 75MB lightweight footprint, instant launch, and 100% local privacy.
Real-time WebSocket Debugging
Full-duplex WS/WSS debugging with custom headers, self-signed SSL verification, heartbeats, and smart keyword/JSON key message filtering.
Concurrency Benchmark Suite
One-click concurrency stress testing with real-time RPS/QPS throughput and P50/P90/P99 latency distribution metrics.
8 Custom Keyboard Shortcuts
Record custom keystrokes for request execution, tab management, and workspace switching with collision detection.
DevToys & Crypto Sandbox
Built-in MD5/SHA/AES/DES cryptographic tools and full CryptoJS script sandbox for easy token generation and signature signing.
In-Depth Comparison: Relay vs Legacy Tools
Objective technical comparison witnessing the evolution of modern developer tools
| Dimension | Relay (v1.3.0) 👑 | Postman (Latest) | Apifox | Insomnia (Latest) |
|---|---|---|---|---|
| CORS Restriction | Zero CORS (Native Sockets) | Restricted / Requires Agent | Relies on external proxy | Partially restricted |
| Package Size | ~75 MB (Ultra-light) | ~450 MB+ | ~350 MB+ | ~300 MB+ |
| Cold Startup Time | < 100ms (Instant) | 5 ~ 10 sec | 4 ~ 8 sec | 3 ~ 6 sec |
| Idle Memory Footprint | ~50 MB | 400 ~ 800 MB | 300 ~ 600 MB | 250 ~ 500 MB |
| Privacy & Offline Storage | 100% Offline · No Forced Sign-in | Forced cloud sign-in & sync | Requires team cloud account | Cloud account sync required |
| WebSocket (WS/WSS) | Full-duplex + Smart Message Filtering | Basic connection only | Basic debugging | Basic connection only |
| Concurrency Benchmark | Built-in Benchmark Dashboard (QPS/P99) | Paid team plan / Add-on required | Cloud quota limit | No benchmark tools |
| Offline Developer Tools | Built-in DevToys (MD5/AES/JWT/CryptoJS) | External web links | Few basic mini-tools | None |
Mobile Utility Suite
A rich collection of Google Play published and standalone utilities, offering both official store downloads and direct APK offline packages.
DouDownloader
Download watermark-free videos and photo collections
Easily download and save watermark-free HD videos and photo albums from Douyin/TikTok, extract background audio MP3s, with multi-threaded high-speed downloads and built-in offline player.
K-Downloader
Watermark-free video & photo downloader with batch saving
Free one-click downloader for Kuaishou watermark-free videos and photos, supporting custom directory naming, gallery storage, and author profile batch downloads.
I-Downloader
Instagram video, Reels and photo downloader
No login required. Safely and quickly download Instagram videos, Reels, and high-res photo albums with multi-threaded acceleration and local management.
X-Downloader
Fast video and animated GIF downloader for X (Twitter)
Dedicated media downloader for X (formerly Twitter), featuring multi-resolution bitrate options, animated GIF support, resume capability, and author batch downloads.
Video Downloader
Effortless web video detector and multi-task downloader
Intelligently detects web video streams with multi-threaded background downloading, resume support, large file handling, and built-in offline media player.
ID Photo
Smart AI portrait cutout, background replacement and 6-inch print layout
On-device AI portrait cutout tool for passport, visa, and ID photos with one-click background color change and standard 6-inch print layout.
PDF Merge & Split Tools
Merge, split, reorder, and compress PDF documents
Pure offline processing to safeguard privacy: merge multiple PDFs into one compact file, split by page range, reorder pages, compress, and export to images.
MangaShelf
Read local ZIP, CBZ, CBR and folder manga with series grouping
Pure local comic reader supporting ZIP, CBZ, CBR archives and folders, with smart series organization, dual-page splitting, and reading progress memory.
SSH Terminal & SFTP
Secure and versatile mobile SSH terminal and SFTP client
Professional mobile SSH client and SFTP file manager featuring customized terminal keyboard bars, bi-directional SFTP transfers, and Android Keystore encryption.
SnapRoom
Instant text & photo synchronization across devices via QR or Token
No account needed. Enter a 6-digit pair token or scan a QR code to sync text snippets and high-res photos instantly across phones and computers.
RedDownloader
Watermark-free photo and video extractor for Xiaohongshu (RED)
Effortless watermark-free media extractor for Xiaohongshu notes, supporting original high-resolution photo albums, LivePhoto motion photos, and video exports.
Our Commitment to Software Safety & Data Privacy
We understand the value of software trust. Every tool here undergoes rigorous multi-engine verification.
VirusTotal Multi-Engine Scanning
All released APKs and Windows installers undergo in-depth scanning by over 60 antivirus engines (Kaspersky, Symantec, Huorong, etc.) on VirusTotal, 100% clean.
Zero Hidden Charges · No Background Daemon
Strictly prohibited from silent billing, mining code, or persistent background daemons. Complete clean uninstall without system residue.
Google Play Double Verification
Core matrix applications are published on Google Play and screened by Google Play Protect automated behavioral security checks.
Local-First · Zero Privacy Abuse
Extracted videos, photos, and converted files are stored locally in your phone album or directory. We never request contacts, location, or camera permissions.
Ad Transparency · No Deceptive Clicks
Compliant with Google Play ad guidelines with clear "Contains ads" badges. Zero aggressive popups; PC desktop Relay is 100% free with no ads.
Frequently Asked Questions (FAQ)
Everything you need to know about Relay, mobile apps, safety, and privacy policies.
Relay Desktop What is Relay, and how does it fundamentally differ from Postman or Insomnia?
What is Relay, and how does it fundamentally differ from Postman or Insomnia?
Relay Desktop Why is Relay naturally immune to CORS cross-origin restrictions?
Why is Relay naturally immune to CORS cross-origin restrictions?
Relay Desktop How do I use the new WebSocket debugging and Benchmark suite in v1.3.0?
How do I use the new WebSocket debugging and Benchmark suite in v1.3.0?
Mobile Apps Are the mobile applications (DouDownloader, VidKeeper, etc.) safe and virus-free?
Are the mobile applications (DouDownloader, VidKeeper, etc.) safe and virus-free?
Mobile Apps What should I do if Android displays an "Unknown Sources" warning when installing an APK?
What should I do if Android displays an "Unknown Sources" warning when installing an APK?
Privacy & Security Do yokiasoft software products collect my personal data or upload API payloads?
Do yokiasoft software products collect my personal data or upload API payloads?
Support & Service How do I report a bug, request a new feature, or ask for technical assistance?
How do I report a bug, request a new feature, or ask for technical assistance?
Have more questions or need technical support? Contact & Support
About yokiasoft
Dedicated to crafting exceptional desktop and mobile utilities. We deliver pure, lightweight, and high-efficiency tools designed to be bloat-free and ready out of the box.
Local & Privacy First
No forced cloud accounts, zero behavioral telemetry. All configs, API snapshots, and history remain 100% on your local machine.
Lightweight & Instant
Zero marketing clutter, no splash screens. Sub-second cold startup, low memory footprint, and distraction-free workflow.
100% Free & Open Access
All apps offer direct APKs and desktop installers with no hidden paywalls. We empower every user with accessible, high-utility tools.