Privacy-first
Local-first, with network tools clearly marked
Know your tools instantly
Convert, inspect, and ship faster with toolcli
Text, data, time, colour, security, and generator utilities live in a single workspace so you always know where to go for quick fixes.
High performance
Edge-accelerated delivery
Multi-language & themes
English/Chinese with light/dark modes
Workflow Picks
Featured workflows
01Open workflow →02Open workflow →03Open workflow →
401 / 403 and webhook troubleshooting
API Auth Debugger
Check JSON bodies, diagnose JWT timing issues, and verify HMAC-SHA256 signatures.
Multi-line content processing
List Cleanup & Export
Clean multi-line content, normalize lists, and export reusable formats.
Web image publishing workflow
Responsive Image Publisher
Turn source images into responsive AVIF and WebP assets, ready-to-use picture markup, and one downloadable package.
Tool Picks
Featured tools
JSON Toolkit
Format, compact, or validate JSON payloads.
Batch Image Lab
Compress multiple images in one go with unified settings, previews, and bulk downloads.
Time Studio
Convert timestamps and dates between multiple formats with ease.
Hash Workbench
Generate SHA digests or HMAC signatures for payloads.
Color Lab
Convert between HEX/RGB or generate vibrant palettes instantly.
Identifier Forge
Mint UUIDs, Nano IDs, secure tokens, passwords, or filler text.
Practical guides
From the blog
Best Online Developer Tools for Everyday Web and Software Workflows
When you constantly bounce between formatting JSON, decoding JWTs or converting timestamps, installing yet another CLI feels heavy. This guide shows how browser‑based developer tools streamline those tasks securely, with practical workflows and checklists for both new and experienced engineers.
Case Converter Workflows for Developers Using Toolcli in the Browser
Keep code, logs, and docs consistent by converting text between UPPERCASE, lowercase, sentence case, and title case directly in your browser with toolcli’s privacy-first case converter, tailored to developer workflows like normalizing JSON keys and cleaning copied UI copy.
Base64 Encode in the Browser: a Practical Guide to Privacy-Friendly Developer Workflows
When you need a privacy-friendly Base64 Encode workflow in the browser, choosing the right client-side utility matters. This guide shows how to use an online binary‑to‑text converter for HTTP payloads, JSON, logs, and data URI generation without leaking sensitive data.