Snake Case Text Transformer

Workflow & Usage

1. Paste your text Drop in a phrase, title, or a whole list (one per line).

2. Get snake_case output instantly The output updates live as you type:

• Hello world → hello_world
• Pricing plan v2 → pricing_plan_v2

3. Copy and use it Click Copy and paste into code, spreadsheets, config files, or database tools.

Need other formats (camelCase, PascalCase, Slug, Title Case, etc.)? Use the full Text Transformer tool.

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What snake_case Is Good For

snake_case is practical because it’s readable, stable, and doesn’t care about spaces:

• Python variables and function names send email reminder → send_email_reminder

• Database columns and exports Turn messy headers into consistent field names before importing data.

• Config keys and system labels Works well in YAML/JSON keys, feature flags, and internal identifiers.

• Filenames that won’t break scripts invoice january 2026.pdf → invoice_january_2026.pdf

Note: For URLs, use Slug (or kebab-case). Hyphens are easier to scan in links, and slugs handle punctuation + trimming in a web-friendly way.

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Examples

Common conversions

• Hello world → hello_world
• API key v2 → api_key_v2
• Room 12A check-in time → room_12a_check_in_time
• already_snake_case → already_snake_case

From separators

• image-resizer tool → image_resizer_tool
• product.price.usd → product_price_usd
• userName → user_name

Multi-line lists

Input:

blog post title
primary button color
utm campaign name

Output:

blog_post_title
primary_button_color
utm_campaign_name

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Use Cases

• Developers Convert human-readable phrases into Python-style names, config keys, and safe identifiers.

• Marketing ops Standardize event names, spreadsheet headers, and internal labels so reporting stays consistent.

• Data cleanup Turn CSV column headers into predictable database fields before imports or migrations.

• Content workflows Create filename conventions for assets, exports, and content batches (especially when you’re zipping and shipping lots of files).

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Tips for Best Results

• Treat this as “make it safe + consistent” snake_case is great for internals, but it’s not meant to look pretty in user-facing copy.

• Watch for team conventions Some teams prefer api_key, others prefer API_key or apiKey. This converter aims for predictable lowercase snake_case. If your style guide differs, do a quick final pass.

• Prefer slugs for the public web If this is going into a URL, go with Slug. It’s designed to stay readable and avoid odd edge cases.

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How It Works

• Split → normalize → join The tool breaks your text into words using common separators (spaces, underscores, dashes, dots, punctuation), then:

• lowercases the words (where casing exists)

• joins them with underscores

• Keeps the useful stuff Numbers are preserved, and line breaks stay intact for bulk conversions.

• Private by default Everything happens in your browser — no uploads, no tracking, no storage.