123024.com v1.2.0
from 11 tools to 43, plus ⌘K and Chinese national crypto (SM2/SM3/SM4)
Same promise: everything runs locally in the browser; nothing is uploaded. This release just goes from “enough” to “covers most of daily development.”
A few months ago I wrote about 123024.com — back then it had 11 high-frequency tools: timestamp, JSON, Base64, JWT, base convert… clean, ad-free, privacy-first.
A common reaction after using it: “Nice — but I still need YAML, Hash, regex, QR codes…”
v1.2.0 is here. Tool count jumps to 43, grouped into 6 categories; browse by category on the home page; pin favorites in the sidebar; hit ⌘K / Ctrl+K to jump to any tool. The privacy promise is unchanged.
Three things that matter most in this upgrade
1. Tools: 11 → 43 — most everyday jobs covered
Before: “a few codecs + JSON + JWT.” Now it’s six categories:
| Category | Count | Typical jobs |
|---|---|---|
| Encode & Decode | 8 | Base64 / URL / JWT / Hex / HTML entities / Unicode… the classics |
| Format & Convert | 10 | YAML↔JSON, JSON↔CSV, JSON→TS / Java POJO, SQL format, color / CSS units / case styles |
| Crypto & Security | 12 | Hash, HMAC, AES, RSA, password gen, UUID, TOTP, SM2/SM3/SM4 (GM/T), cert check, file checksum |
| Generators | 5 | Timestamp, QR, Cron, Lorem, mock data |
| Reference | 3 | HTTP status codes, ASCII table, HTML entity table |
| Text & Utilities | 5 | Regex tester, text Diff, word count, Markdown preview, cURL → code |
One line: one site for debug, convert, generate, and look up. No more hopping across five throwaway sites — and no guessing whether one of them uploads your content.
2. ⌘K command palette: find a tool like finding a file
With dozens of tools, clicking through the sidebar gets old. v1.2.0 adds an interaction developers already know:
- Press
⌘K/Ctrl+K(or/) to open the search palette - Fuzzy search across Chinese/English names and keywords
- Aliases like
format.json/token.jwtfor keyboard-first users - Empty query preloads Recent — return visits cost almost nothing
Open site → ⌘K → two letters → Enter. Faster than opening another bookmark.
3. Favorites + category home: return visits without getting lost
-
★ Favorites: star a tool to pin up to 12 at the top of the sidebar (stored in local
localStorage— no login, no server sync) - Recent: automatically remembers the last 5; pick up where you left off
- Category home: six category cards on the landing page; each opens a category page; sidebar groups are collapsible by category
Information architecture shifts from “one long tool list” to three parallel paths — browse by category, pin favorites, or search — beginners explore, power users jump with ⌘K.
New tools worth calling out
Chinese national crypto suite: SM2 / SM3 / SM4
On projects that talk to banks, government systems, or large state-owned enterprises in China, GM/T (国密) is often non-negotiable. Many online tools only offer MD5/SHA/AES — either no national algorithms, or they compute them on someone else’s server.
123024.com puts the engineering “national crypto trio” in the browser:
- SM2: asymmetric crypto / identity and key-related flows
- SM3: digest / integrity
- SM4: symmetric encryption for the data itself
All local. Keys and plaintext never leave the browser. That’s a real differentiator versus typical converter sites.
Format conversion bundle
The pain in front/back integration usually isn’t “can’t write code” — it’s “formats don’t match”:
- YAML ↔ JSON: flip config formats
- JSON ↔ CSV: APIs ↔ spreadsheets
- JSON → TypeScript / Java POJO: paste sample JSON, get types or entity skeletons
- SQL Formatter: unreadable SQL → readable in a second
-
Case Converter: batch
camelCase/snake_case/kebab-case - Color / CSS Unit: design tokens ↔ code units and color spaces
Classic “use and leave” jobs that used to need three or four sites — now closed-loop in one place.
Everyday crypto & security
- Hash / HMAC / AES / RSA: signatures, verify, encrypt/decrypt while debugging
-
Password generator: local
crypto.getRandomValues, tunable strength - UUID v1 / v4 / v7: old and new specs
- TOTP / 2FA: local codes for testing MFA flows
- SSL certificate check / file checksum: quick integrity and cert checks
Sensitive material (keys, tokens, cert details) still stays on your machine.
Generators & text utilities
- QR, Cron, mock data, Lorem: less boilerplate during prototypes and integration
- Regex tester, text Diff, Markdown preview, word count, cURL → code: docs, log diffs, handing APIs to the frontend — all less friction
Privacy promise: version changed, floor didn’t
v1.2.0 adds thirty-plus tools, but the product principle didn’t budge:
All convert, crypto, and format work runs in the browser. Input is not uploaded to a server.
- Free, no login
- Favorites / recent live only in your
localStorage - Still a static site + CDN — no “new backend just for features”
When you’re debugging JWTs, pasting production config snippets, or handling SM2/SM4 keys, “data never leaves the browser” beats another flashy feature.
Who should care about this upgrade
| Role | Especially useful in v1.2.0 |
|---|---|
| Backend / gateway | JWT, Hash/HMAC, AES/RSA, SM2/SM3/SM4, Cron, SQL, YAML↔JSON |
| Frontend / full-stack | JSON→TS, color / CSS units, Case, QR, regex, Diff, Markdown |
| Security / ops | Hash, password gen, TOTP, SSL check, file checksum, SM suite |
| Data / API integration | JSON↔CSV, mock data, cURL→code, HTTP status reference |
| Privacy-conscious developers | Whole site local; no need to dump sensitive debug content on third parties |
How to start
- Open https://123024.com
- Press
⌘K/Ctrl+Kand search for today’s tool - Star favorites with ★ — they pin to the top of the sidebar next time
- Share a focused link with
/solo/{tool-id}when a teammate only needs one tool
Bilingual UI, per-tool SEO pages, Solo focus pages — all carried over from v1.1. v1.2.0 just completes the everyday toolbox on top of “good enough.”
Bottom line: still the clean, ad-free, privacy-first developer tools site — more tools, faster find, clearer categories, plus GM/T crypto and a pile of format/security essentials.
If you’re done with ad popups and “did this site upload my paste?”, give 123024.com another look.
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