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Hitung token, perkirakan biaya API, susun prompt, decode JWT, hitung pinjaman, buat QR code, jalankan timer kelas — tanpa pendaftaran, data tidak meninggalkan perangkat Anda.
Halaman alat individu saat ini ditampilkan dalam bahasa Inggris.
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🤖 For AI users
Tools optimized for daily LLM workflows
Token Counter
Accurate token count for ChatGPT, Claude, Gemini, Llama. Live input cost.
API Cost Calculator
Estimate monthly/yearly LLM API spend. Compare which model is cheapest.
Prompt Builder
Compose well-structured prompts. 6 templates for common tasks.
Markdown Preview
Render markdown live — paste ChatGPT/Claude output. GFM, tables, code blocks.
AI Model Comparison
GPT-5, Claude 4.7, Gemini 2.5, Llama 4, DeepSeek — context, pricing, modality (2026).
Text Diff
Paste 2 texts → highlight diffs at word/line/char level. Great for diffing AI outputs.
JSON Schema Generator
Generate JSON Schema (Draft-07) from a sample — for LLM structured output and API validation.
👨💻 For developers
Decode, format, convert — daily dev tools
JWT Decoder
Decode JWT tokens — header, payload, claims with readable timestamps.
JSON Formatter
Format / minify / validate JSON. Sort keys A-Z, custom indent, Ctrl+Enter shortcut.
Regex Tester
Test regex live with match highlighting. 7 ready presets including Vietnamese.
UUID / Hash / Base64 / URL
Bundle: UUID v4, SHA-256/512 hash, Base64 (URL-safe), URL encode.
Remove Vietnamese diacritics
Strip diacritics for slugs, filenames, usernames, identifiers. Optional đ → d.
URL Slug Generator
Title → SEO-clean URL slug. Strip diacritics, lowercase, custom separator.
Char / Word / Line Counter
Real-time char/word/line/paragraph count + SEO meta (60/160) and tweet (280) meters.
Password Generator
Cryptographically secure random passwords with entropy meter, custom char classes.
Text Case Converter
10 cases: UPPER, lower, Title, camelCase, snake_case, kebab-case, CONSTANT_CASE...
Lorem Ipsum (incl. Vietnamese)
Generate placeholder text — Latin / Vietnamese / Hacker speak. Optional <p> wrap.
Sort / Dedupe / Shuffle
A-Z, numeric, reverse, shuffle, dedupe — Vietnamese-aware.
Color Picker
Pick HEX/RGB/HSL, RGB sliders, 12 presets, nearest Tailwind name.
JSON ↔ YAML
Convert between JSON and YAML — auto-conversion as you type, flow style supported.
Code Diff
Side-by-side code diff.
👩🏫 For teachers
Classroom tools teachers use every day
Random Picker
Pick a random student from a list. No-repeat mode.
Group Maker
Split a class into N balanced groups, or by group size.
Classroom Timer
Fullscreen countdown for class. Color warnings + alarm.
Pomodoro Timer
25/5/15, auto-advance, sound + notification, daily pomodoro count.
Grade Average Calculator
Weighted average, VN-scale classification, distribution chart.
Grade Convert 10 ↔ 4 ↔ Letter
10-scale (VN) ↔ 4-scale GPA (US) ↔ letter A/B/C/D/F. Bulk convert.
Classroom Attendance
Roster management, Present/Absent/Late, notes, save sessions, CSV export.
AI Quiz Generator
AI generates quizzes.
SEGERAAI Lesson Plan
AI lesson plan templates.
SEGERAFlashcards from text
Auto flashcards from material.
🏢 For business
Finance, ops, marketing — VN-specific
VN Loan & Deposit Calculator
Deposit + loan repayment, decreasing & flat rate, full amortization.
QR Code Generator
QR for URL, WiFi, vCard. Custom colors, download PNG.
VN Salary Calculator
Vietnam 2026: SI 8%, HI 1.5%, UI 1%, progressive PIT, personal + dependent deductions.
Age & Date Diff Calculator
Exact age (Y/M/D), total days lived, next birthday; or diff between 2 dates.
VND Currency Converter
Convert VND ↔ 9 currencies. Editable rates, persists locally.
BMI Calculator
BMI from height + weight, 6 WHO classes, healthy weight range.
CV Extractor (AI)
AI parses CVs into a table.
SEGERAAI Email Writer
AI work email writer.
SEGERAAI Product Description
AI product copy for sellers.
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