{"id":"pg_0nuwx1nrqq0s","property_id":"prp_pfcr5h8cztsp","domain_id":"dom_gkgeprhezjg4wq","root_domain":"smashsend.com","locale":"en","url":"https://smashsend.com/custom-fields","url_hash":"0b26cffb22e848328c92fc2b75f7220c9d92999da48c51936fbc4ead81e9d523","path":"/custom-fields","depth":1,"canonical_url":"https://smashsend.com/custom-fields","canonical_page_id":null,"page_type":"landing","page_type_guess":"landing","state":"indexed","skip_reason":null,"priority":"0.9","discovered_via":"sitemap","first_seen_at":"2026-08-28T03:07:01.092Z","last_seen_at":"2026-09-27T04:10:13.112Z","http_status":200,"content_hash":"5a8fecbd4b8a696d2b7ccd9dfc12c65c751e6abd219c38fcaa5d1fb06a9ad771","title":"Custom Fields - Store Any Data, Personalize Everything | SMASHSEND","description":"Powerful custom fields to track any customer data. Store text, numbers, dates, lists, and more. Create unlimited properties and use them across campaigns, automations, and segments.","author":null,"published_at":null,"modified_at":null,"word_count":741,"reading_time_sec":202,"lang_detected":"en","images":[],"links_out":null,"markdown_source":"readability","refresh_interval":"monthly","last_fetched_at":"2026-09-27T04:11:29.350Z","next_refresh_at":"2026-10-27T04:11:29.350Z","runs_count":2,"changes_count":0,"last_changed_at":null,"fail_count":0,"last_error":null,"created_at":"2026-08-28T03:07:01.092Z","updated_at":"2026-08-28T03:07:01.092Z","inlinks":2,"inlinks_body":0,"outlinks":31,"outlinks_external":10,"anchor_terms":[],"template_score":"0.01408450704225352113","cash":"0","cash_total":"0.2093118416175497671","pagerank":"0.00555510946936839","is_orphan":false,"link_confirmed":true,"discovered_wave":0,"embedded_hash":null,"embedded_at":null,"domain_name":null,"brand_color":null,"domain_rank":null,"spam_score":null,"markdown":"[\n\n![SMASHSEND email marketing - The #1 Email Marketing Tool that turns emails into revenue](https://smashsend.com/_next/static/media/smashsend_dark.da05b6ec.svg)\n\n![SMASHSEND email marketing - The #1 Email Marketing Tool that turns emails into revenue](https://smashsend.com/_next/static/media/smashsend_dark.da05b6ec.svg)\n\n](https://smashsend.com/)\n\nFeatures\n\nIntegrations & API\n\nResources\n\n1.  [\n    \n    Home\n    \n    ](https://smashsend.com/)\n\n/\n\n3.  [\n    \n    Custom Fields\n    \n    ](https://smashsend.com/custom-fields)\n\nGo beyond basic contact info. With SMASHSEND Custom Fields, track any data that matters to your business — from shoe sizes to subscription tiers, purchase history to preferences.\n\nUnlimited custom fields · All data types supported · API access included\n\nE-commerce fieldsMulti-select\n\n`favorite_categories`\\[\"Electronics\", \"Fashion\"\\]\n\n`lifetime_value`$2,450.00\n\n`last_purchase_date`2024-03-15\n\n`preferred_size`Large\n\nSaaS propertiesNumber\n\n`api_calls_this_month`45,291\n\n`team_members`12\n\n`storage_used_gb`28.5\n\n`feature_adoption_score`87%\n\n## The most flexible custom fields in email marketing\n\nWhile others limit you to basic fields, SMASHSEND gives you the power to store any data type, create complex properties, and use them everywhere.\n\n∞\n\nUnlimited fields\n\n10+\n\nData types\n\n0ms\n\nReal-time sync\n\n## Every data type you need\n\n### Text & numbers\n\nStore names, descriptions, IDs, scores, prices, quantities, or any text and numeric data. Perfect for basic customer information and metrics.\n\n### Lists & arrays\n\nTrack multiple values like product interests, tags, categories, or preferences. Use single-select or multi-select options for structured data.\n\n### Dates & booleans\n\nCapture timestamps, anniversaries, expiration dates, or yes/no flags. Perfect for time-based automations and conditional logic.\n\n### JSON objects\n\nStore complex nested data structures for advanced use cases. Perfect for developers who need maximum flexibility.\n\n### Encrypted fields\n\nStore sensitive data securely with field-level encryption. Perfect for PII, tokens, or any confidential information.\n\n### Computed fields\n\nCreate dynamic fields that calculate values based on other properties. Update automatically as source data changes.\n\n## Use custom fields everywhere\n\nYour custom fields aren't locked away — use them across the entire SMASHSEND platform for truly personalized experiences.\n\n### In email campaigns\n\nPersonalize every email with custom field tokens. Display customer-specific data, recommendations, or dynamic content based on any property.\n\n### In segmentation\n\nBuild powerful segments using any custom field. Combine multiple conditions with AND/OR logic to target exactly the right audience.\n\n### In automations\n\nTrigger workflows based on custom field changes. Update fields automatically, create conditional branches, or sync with external systems.\n\n### Via API & webhooks\n\nFull API access to read and write custom fields. Receive webhooks when fields change. Keep your entire stack in sync.\n\n## Personalize with field tokens\n\nReference any property directly in your campaign copy.\n\n```\nHi {{first_name}},\n\nBased on your preference for {{favorite_category}},\nwe thought you'd love our new collection!\n\nYour loyalty points: {{loyalty_points}}\nMember since: {{member_since}}\n```\n\n## Real-world use cases\n\nSee how businesses use SMASHSEND Custom Fields to create powerful, data-driven email experiences.\n\nE-commerce\n\n### Personalization that uses real history\n\nTrack purchase history, browsing behavior, size preferences, and wish list items, then target recommendations off those fields.\n\nTargeted product recommendations convert 3x better.\n\nSaaS\n\n### Onboarding driven by adoption\n\nMonitor feature adoption, usage metrics, and subscription details, and trigger onboarding emails from user behavior and progress.\n\nEvery onboarding email matches where the user actually is.\n\nEducation\n\n### Courses that respond to progress\n\nTrack course progress, quiz scores, and learning preferences to send content recommendations and achievement celebrations.\n\nLearners get the next step, not the same newsletter.\n\nHealthcare\n\n### Compliant, personal reminders\n\nStore appointment history, preferences, and consent data securely with field-level encryption.\n\nHIPAA-compliant reminders and personalized health tips.\n\nReal estate\n\n### Match leads to listings\n\nTrack property preferences, budget ranges, and viewing history so the right listing reaches the right lead.\n\nLeads matched with properties automatically.\n\nGaming\n\n### Player-aware messaging\n\nStore player stats, achievements, and preferences to drive game updates, rewards, and recommendations.\n\nUpdates that reflect how each player actually plays.\n\n## SMASHSEND vs. limited field systems\n\nMost email platforms limit you to basic fields. See why developers and marketers choose SMASHSEND for true flexibility.\n\nFeature\n\nSMASHSEND\n\nOthers\n\nNumber of custom fields\n\nUnlimited\n\n10-50 fields\n\nData types supported\n\nAll types + JSON\n\nText & numbers only\n\nArray/list support\n\nNative support\n\nNot supported\n\nAPI access\n\nFull CRUD API\n\nLimited or paid\n\nField validation\n\nCustom validators\n\nBasic only\n\nPricing\n\nIncluded free\n\nPremium add-on\n\n## Developer-friendly integration\n\nBuilt by developers, for developers. Integrate custom fields with your application in minutes, not days.\n\n```\n// Create a custom field\nconst field = await smashsend.customFields.create({\n  name: 'subscription_tier',\n  type: 'select',\n  options: ['free', 'pro', 'enterprise'],\n  defaultValue: 'free'\n});\n\n// Update contact with custom field\nawait smashsend.contacts.update('ctc_abc123', {\n  email: 'user@example.com',\n  properties: {\n    subscription_tier: 'pro',\n    last_login: new Date(),\n    feature_flags: ['dark_mode', 'beta_access'],\n    usage_stats: {\n      api_calls: 1523,\n      storage_gb: 12.5\n    }\n  }\n});\n```\n\n## Part of the complete SMASHSEND platform\n\nCustom fields work seamlessly with every SMASHSEND feature. One platform, infinite possibilities.\n\n## Start building with custom fields today\n\nJoin thousands of businesses using SMASHSEND Custom Fields to create truly personalized email experiences.\n\nUnlimited fields • All data types • Full API access • Free forever","storage":{"htmlKey":"stealpage/html/smashsend.com/pg_0nuwx1nrqq0s/run_v9koxdwyj1hd.html.gz","markdownKey":"stealpage/md/smashsend.com/pg_0nuwx1nrqq0s/run_v9koxdwyj1hd.md.gz"},"facets":null,"assets":[{"kind":"image","src_url":"https://smashsend.com/og-custom-fields.png","r2_key":null,"alt":null,"caption":null,"width":null,"height":null,"is_hero":true,"zone":"main"},{"kind":"image","src_url":"https://smashsend.com/_next/static/media/smashsend_dark.da05b6ec.svg","r2_key":null,"alt":"SMASHSEND email marketing - The #1 Email Marketing Tool that turns emails into revenue","caption":null,"width":135,"height":30,"is_hero":false,"zone":"unknown"},{"kind":"image","src_url":"https://smashsend.com/dashboard/integrations/zapier_icon_filled.png","r2_key":null,"alt":"Zapier","caption":null,"width":20,"height":20,"is_hero":false,"zone":"nav"},{"kind":"image","src_url":"https://smashsend.com/dashboard/integrations/mailchimp_icon.png","r2_key":null,"alt":"Mailchimp","caption":null,"width":20,"height":20,"is_hero":false,"zone":"nav"},{"kind":"image","src_url":"https://smashsend.com/dashboard/integrations/webhooks_icon_gradient.png","r2_key":null,"alt":"Webhooks","caption":null,"width":20,"height":20,"is_hero":false,"zone":"nav"},{"kind":"image","src_url":"https://smashsend.com/dashboard/integrations/events.png","r2_key":null,"alt":"Events API","caption":null,"width":20,"height":20,"is_hero":false,"zone":"nav"},{"kind":"image","src_url":"https://smashsend.com/_next/image?q=75&url=%2Favatar-profile.png&w=3840","r2_key":null,"alt":"Jorge Ferreiro","caption":null,"width":null,"height":null,"is_hero":false,"zone":"nav"},{"kind":"image","src_url":"https://smashsend.com/_next/image?url=%2Favatar-profile.png&w=3840&q=75","r2_key":null,"alt":"Jorge Ferreiro","caption":null,"width":null,"height":null,"is_hero":false,"zone":"nav"},{"kind":"image","src_url":"https://smashsend.com/_next/static/media/smashsend_light.be8a3849.svg","r2_key":null,"alt":"SMASHSEND email marketing - The #1 Email Marketing Tool that turns emails into revenue","caption":null,"width":171,"height":38,"is_hero":false,"zone":"footer"},{"kind":"image","src_url":"https://smashsend.com/marketing/legal/gdpr_compliance.png","r2_key":null,"alt":"SOC2","caption":null,"width":null,"height":50,"is_hero":false,"zone":"footer"}],"shots":[{"viewport":"mobile","width":390,"height":844,"r2_key":"stealpage/shots/smashsend.com/pg_0nuwx1nrqq0s/run_v9koxdwyj1hd-mobile.png","phash":"26e8f4f0e8aac89e","visual_delta":0,"captured_at":"2026-09-27T04:11:33.146Z"},{"viewport":"desktop","width":1440,"height":900,"r2_key":"stealpage/shots/smashsend.com/pg_0nuwx1nrqq0s/run_v9koxdwyj1hd-desktop.png","phash":"9ed4f06061d1d3d1","visual_delta":0,"captured_at":"2026-09-27T04:11:32.930Z"},{"viewport":"mobile","width":390,"height":844,"r2_key":"stealpage/shots/smashsend.com/pg_0nuwx1nrqq0s/run_k-1otn1wsazf-mobile.png","phash":"26e8f4f0e8aac89e","visual_delta":null,"captured_at":"2026-08-28T03:16:33.013Z"},{"viewport":"desktop","width":1440,"height":900,"r2_key":"stealpage/shots/smashsend.com/pg_0nuwx1nrqq0s/run_k-1otn1wsazf-desktop.png","phash":"9ed4f06061d1d3d1","visual_delta":null,"captured_at":"2026-08-28T03:16:32.251Z"}],"history":[{"id":"run_v9koxdwyj1hd","started_at":"2026-09-27T04:11:29.342Z","http_status":200,"fetcher":"direct","changed":false,"diff":{"added":0,"removed":55,"similarity":null},"word_count":741},{"id":"run_k-1otn1wsazf","started_at":"2026-08-28T03:16:22.566Z","http_status":200,"fetcher":"direct","changed":false,"diff":null,"word_count":796}],"citedBy":[]}