Alternatives to Day
47 alternatives to Day in Developer Tools. Ones the founder approved come first; the rest are listings in the same category.
Swastik Codes
Web-based API platform for designing, testing, mocking, monitoring and documenting REST, GraphQL, gRPC, WebSocket, MQTT and MCP APIs
- Same category
- India
ValidateHTML
HTML validation API and free online validator for deployed pages
- Same category
- France
BuildFerry
Install iOS builds on any iPhone with one link
- Same category
FiveM Backdoor Scanner
Free browser-based scanner to detect hidden code, loaders and credentials in FiveM resources
- Same category
- Established
SEOpeck
Free web tools for SEO, code and everyday tasks
- Same category
C2PA Lab
Free browser-based C2PA Content Credentials checker and provenance viewer
- Same category
Konjugate
Open-source graph simulation software for dynamic systems modeling
- Same category
- MVP
Tabel
A fast, private database client for PostgreSQL and SQLite on Mac
- Same category
Sniptide
A pastebin with rules for sharing code and environment files, built for coding agents
- Same category
- Austria
Moxie Docs
Keep your GitHub docs as current as your code
- Same category
- United States
SysEdge
Ontological knowledge graph that surfaces specification gaps, test coverage gaps, and unaddressed architecture standards before code ships
- Same category
ViewKit
Free in-browser viewer for scientific and ML data files
- Same category
BracketView
Privacy-first JSON workspace for viewing, formatting, validating, and querying API data
- Same category
- Startup
-
termique
One terminal for every host, synced end-to-end encrypted across all your devices
- Same category
- Indonesia
Fallow
Codebase intelligence for TypeScript and JavaScript
- Same category
- Startup
- Netherlands
Castov
Fast, 100% client-side developer platform with zero-data logging
- Same category
LetsDeployIt
Ship AI-built apps to the App Store and Google Play in 3 to 4 weeks, flat fee, approved or money back
- Same category
Keep Mac Awake
Keep your MacBook awake with the lid closed for long-running AI agents and tasks, no external display needed
- Same category
- Startup
Macsmith
Your developer tools. One Mac app.
- Same category
Discord ID Lookup
Free Discord user lookup and ID finder for account age, creation dates, avatars, banners and badges
- Same category
YouTube Transcript Pro
Free YouTube transcript downloader for videos, playlists, and entire channels
- Same category
- Startup
- United Kingdom
Intlayer
Type-Safe. Translate with AI. Edit Visually.
- Same category
- Startup
StackRender
Visual database schema design and SQL migration generation tool
- Same category
CachePlex
Smart Tools · Smarter Workflows
- Same category
ArkalEdge
A software company that builds apps, tools, and interactive experiences with AI
- Same category
- Startup
- India
Hronaut
A separate, visible browser for every project your coding agent touches
- Same category
- Startup
-
AA1 Labs
Independent software studio building tools for researchers and everyday work
- Same category
- United Kingdom
Volley
API sequence diagram tool with payloads on every arrow
- Same category
klenua build
Bump version and build numbers without breaking anything
- Same category
Muster
Mac menu bar app that shows which Claude Code, Codex or Cursor session needs you
- Same category
PCWattVault
Real-time PC power consumption monitor for Windows with electricity cost tracking
- Same category
Random Credit Card Generator
Free Luhn-valid test credit card generator for software testing
- Same category
FNJ
A tool that converts published Framer websites into production-ready Next.js projects or optimized static HTML with improved performance and SEO.
- Same category
-
JSON TOON
Convert JSON to TOON format and reduce LLM token costs
- Same category
HyperFrontend
Micro-frontend architecture framework for composing web applications
- Same category
ProxyForge
Free Nginx and Apache config generator for reverse proxies, WordPress, static sites and PHP-FPM
- Same category
Offrun
Run Claude Code, Codex, Antigravity, Grok Build and Muse Code in parallel on your Mac with git worktrees and peer review
- Same category
- United States
Octri.dev
API docs, SDKs, MCP and monitoring from your OpenAPI spec
- Same category
- Startup
Gestell
Tools for GPU performance analysis and compiler understanding
- Same category
IT-BAER
Apps and tools for self-hosters and admins
- Same category
- Austria
-
Design Extractor
Turn any website into AI-ready design documentation
- Same category
- United States
MeloSkill
Frontend and UI skills for coding agents
- Same category
Symvanta
Code knowledge graph MCP server for AI agents to understand codebases accurately
- Same category
Format JSON Online
Free online JSON formatter, validator, minifier and converter with 60+ tools for developers
- Same category
- Startup
- United States
PasteDL
Free Instagram and TikTok downloader for public videos, Reels, stories, photos and profile pictures
- Same category
- Startup
- India
-
KitDecoder
Encode, decode, format and convert data online
- Same category
- Established
Yokka
The kanban board for AI coding agents
- Same category
- Growing
- Ireland