Prompt Release Stack
Use before deploying prompt updates to production.
Open stack workflowBrowser-Only and Privacy First
Free Online Developer and AI Tools
Run formatting, conversion, prompt QA, privacy checks, and productivity workflows directly in your browser. No sign-up and no server-side processing for tool input.
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Developer Tools
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Converters
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AI Tools
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Text Tools
21 tools available
Quick Tool Search
Search before browsing topic hubs.
Topic Hubs
Curated collections for high-intent workflows and stronger internal SEO clustering.
AI Prompt Quality
Improve prompt reliability with linting, regression testing, grounding checks, and output contract validation.
Privacy and Security
Reduce sensitive-data leakage with prompt firewall checks, pseudonymization, secret scanning, and browser privacy audits.
PDF Workflows
Handle full PDF workflows in-browser: merge, split, convert to images/text, and build PDFs from images.
Featured AI and Privacy Tools
High-demand tools for prompt quality, grounding, and sensitive-data handling.
TOK
AI Token Counter
Estimate token usage for prompts and texts across AI models. Fast browser-side estimate.
AIC
AI Cost Estimator
Estimate AI usage costs per request/day/month with custom token pricing and cache ratio.
PPF
Prompt Policy Firewall
Scan prompts for PII, secrets, and injection patterns before sending data to AI models.
LRG
LLM Response Grader
Grade model responses using weighted rubric rules, regex checks, and banned-term penalties.
RCR
RAG Context Relevance Scorer
Rank retrieval chunks for a query with overlap, phrase hits, and redundancy penalties.
SDP
Sensitive Data Pseudonymizer
Replace sensitive identifiers with reversible placeholders before sending text to AI.
Recommended Tool Stacks
Curated tool bundles for common AI workflows. Start with a stack and run it end-to-end.
RAG Grounding Stack
Improve retrieval signal and reduce unsupported answer claims.
Open stack workflowPrivacy Hardening Stack
Reduce leakage risk in prompts and snippet-based workflows.
Prompt Security ScannerPrompt Injection SimulatorPrompt Policy FirewallPrompt Guardrail Pack Composer
Open stack workflowOutput Validation Stack
Harden parser-safe outputs and function/tool-call payloads.
Open stack workflowWorkflow Guides
Step-by-step landing pages for high-intent AI tasks like release checks, RAG grounding audits, and output validation.
Prompt Release Checklist
Run a practical pre-release prompt QA flow with linting, policy checks, replay testing, and final go/no-go scoring.
RAG Grounding Audit
Tune chunk quality and retrieval grounding with chunk simulation, noise pruning, relevance scoring, and claim-evidence checks.
AI Output Validation
Validate model output format and schema safety for automation pipelines using contract tests and function-call schema checks.
Prompt Safety Hardening
Harden prompt safety using security scans, policy firewalls, guardrail templates, and replay testing for jailbreak resilience.
Tool Explorer
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Showing 24 of 216 tools
{ }
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
B64
Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings instantly.
ID
UUID Generator
Generate random UUIDs (v4) with one click. Bulk generation supported.
Aa
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words.
#
Word Counter
Count words, characters, sentences, and paragraphs in any text.
%
URL Encoder / Decoder
Encode or decode URLs and query strings. Handles special characters.
#!
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text.
***
Password Generator
Generate strong, random passwords with customizable length and characters.
HEX
Color Picker
Pick colors and convert between HEX, RGB, and HSL formats.
MD
Markdown Preview
Write Markdown and preview the rendered HTML output in real time.
CSS
CSS Minifier / Beautifier
Minify or beautify CSS code. Remove whitespace or format for readability.
+/-
Diff Checker
Compare two texts and highlight the differences line by line.
UTC
Epoch / Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa.
CSV
JSON to CSV Converter
Convert JSON arrays to CSV format and CSV back to JSON.
/-/
Slug Generator
Convert any text into a URL-friendly slug. Clean, lowercase, hyphenated.
.*
Regex Tester
Test regular expressions against text with real-time highlighting of matches.
JWT
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and expiration.
<
HTML Encoder / Decoder
Encode special characters to HTML entities or decode them back to text.
0 *
Cron Expression Generator
Build and understand cron expressions with a visual, interactive editor.
0x
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal.
Aa
Text Case Converter
Convert text between uppercase, lowercase, camelCase, snake_case, and more.
rwx
Chmod Calculator
Calculate Unix file permissions in octal and symbolic notation.
T
Timestamp Converter
Convert between ISO 8601, Unix timestamps, and human-readable dates.
\n
Backslash Escape / Unescape
Escape or unescape special characters like newlines, tabs, and quotes.
Tool Comparisons
Side-by-side decision pages for similar AI and workflow tools.
Prompt Linter vs Prompt Policy Firewall
Prompt quality checks vs prompt safety checks before model calls.
Claim Evidence Matrix vs Grounded Answer Citation Checker
Claim-level mapping vs citation-level grounding validation.
PDF to JPG Converter vs PDF to PNG Converter
Smaller lossy exports vs sharper lossless exports for PDF pages.
RAG Noise Pruner vs RAG Context Relevance Scorer
Chunk cleanup and pruning vs relevance ranking and scoring.
SEO and Crawl-Friendly Structure
CodeUtilo organizes tools into crawlable categories and static pages so search engines can index specific user intents such as AI prompt testing, privacy utilities, and developer workflows.
For best discovery, start from Categories and navigate to focused tool pages with canonical metadata and structured data.