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
Privacy-First Online JSON Editor and Formatter for Browser-Based Debugging
When API responses, logs, and configs are all in JSON, a privacy‑first online JSON editor and formatter becomes a core debugging tool, helping you quickly view, validate, beautify, and convert payloads entirely in the browser without sending data to any server.
Using an Online Base64 Encoder Decoder in Developer Workflows with ToolCLI
Developers often need a fast, privacy-safe way to inspect Base64-encoded text, JSON, binaries, and URL tokens in the browser. This guide shows how ToolCLI’s in-browser Base64 encoder/decoder fits into everyday debugging, QA workflows, and secure payload validation.
Using Online JSON Validator and Formatter Tools in a Developer Workflow
When you are debugging APIs, logs or config files, a browser-based JSON validator and formatter in toolcli lets you quickly validate, beautify and inspect payloads entirely client-side, keeping your workflow fast while protecting sensitive data from being uploaded.