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
Converter Unix Timestamp to Date: Using Toolcli for Accurate Epoch to Human Time
When logs, payloads, or metrics only show Unix epoch numbers, it’s hard to see what actually happened and when. This guide shows how developers can turn those timestamps into readable dates using toolcli’s in‑browser converter with precise units and UTC/local views.
Date to Unix Timestamp Converter for Browser-Based Time Debugging
When you are debugging APIs, logs, or frontend event timelines, a Date To Unix Timestamp Converter in toolcli lets you safely switch between human-readable dates, Unix epoch seconds or milliseconds, and ISO 8601 UTC strings directly in the browser without breaking your workflow.
Base64 Decoder Encoder as a Privacy-Focused in-Browser Debugging Workspace
When you’re debugging APIs, JWTs, or log snippets, a browser‑only Base64 encoder/decoder lets you safely inspect and transform data without leaking payloads. This guide focuses on using ToolCLI’s in‑browser Base64 utility as a privacy‑friendly workbench for developers.