BIMI SVG Tiny PS Logo Format Requirements & Converter Guide 2026

What Is BIMI SVG Tiny PS and Why Does It Matter in 2026?

You send emails. You’ve verified your domain. You’ve got SPF, DKIM, and DMARC set. But your open rates haven’t budged. Why? Because even with technical correctness, inbox trust still leans on visual cues—and your brand logo is missing.

BIMI SVG Tiny PS is how verified brand logos appear in Gmail, Yahoo, and other major inboxes. It’s not a gimmick. It’s a deliverability signal. In 2026, it’s a baseline expectation. If your logo doesn’t meet the stringent requirements of the BIMI SVG Tiny PS format, your messages risk being treated as untrusted—even if everything else is technically sound.

Think of BIMI as the digital equivalent of a recognizable company sign on a mailbox. It’s small, but it says: “This is who you’re receiving mail from.” Without correctly formatted BIMI SVG Tiny PS, that sign isn’t legible—and inboxes default to skepticism.

Key takeaways

• BIMI SVG Tiny PS is a specific, minified SVG format required for brand logos to display in supported email clients like Gmail and Yahoo.
• Only logos in the BIMI SVG Tiny PS format can be validated and trusted at scale, making it mandatory for brands aiming for high inbox placement in 2026.
• Incorrect formatting—such as using full SVG, non-compliant syntax, or unsupported file types—triggers rejection, even with valid DNS records.

What Are the BIMI SVG Tiny PS Format Requirements?

You need an SVG 1.1 Tiny Profile file under 10 KB, no larger than 512x512 pixels, with only basic shapes, solid fills, and embedded fonts. No transparency, gradients, external images, CMYK colors, or scripts. The logo must be centered and scaled to fit a 144x144 pixel canvas using RGB or hex colors. Complex paths, opacity, and external resources are not allowed. This ensures consistent rendering across BIMI-supporting email clients.

Core Technical Requirements

• Use SVG 1.1 Tiny Profile only — no SVG 2.0 or Extended profiles. This is the standard defined by the W3C for lightweight email use.
• File size must be under 10 KB to ensure delivery speed and compatibility across email platforms.
• Maximum dimension: 512x512 pixels. While larger is allowed, only the central 144x144 area is used.
• Embed all fonts; do not reference external web fonts. Using system fonts or full embedding prevents rendering failures.
• No external images, scripts, or animations. Only basic geometric shapes (rectangles, circles, paths) with solid, non-transparent fills.
• Color must be specified in RGB or hexadecimal. CMYK, spot colors, or color profiles are not supported by BIMI.

Layout and Design Constraints

• Logo must be centered within a 144x144 pixel square — the BIMI standard display size.
• No gradients, opacity, or blending modes. Use solid single-color or limited-color designs only.
• Limit complex paths and nested shapes. The design should remain simple enough for low-bandwidth rendering.
• Each shape or group must be minimal; overly complex structures increase fail rates in email clients.
• Test your logo using a BIMI verifier like BIMI.org’s validator or RFC 8429 to ensure compliance.

Let’s be clear: even if your logo looks great in a vector editor, it may fail BIMI if it violates any of these rules. Tools like Inkscape or Illustrator can export BIMI-compliant files, but you must validate output manually or with a checker.

For teams running large email campaigns, automating BIMI verification helps avoid delivery issues. Use a tool like MailTester’s inbox placement checker to test live deliverability and confirm that your BIMI logo renders correctly in real inboxes across major platforms.

How Is BIMI SVG Tiny PS Different from Regular SVG?

BIMI SVG Tiny PS is a stripped-down, security-focused version of SVG designed exclusively for email branding. Unlike full SVG, it disables scripting, filters, and external references to prevent abuse. It enforces minimalism to ensure fast, safe rendering in email clients, making it ideal for brand logos in inboxes—where clarity and speed matter more than design complexity.

What BIMI Tiny PS Leaves Out

Regular SVG supports advanced features like JavaScript, embedded styles, and complex filters—none of which are allowed in BIMI Tiny PS. This means no interactivity, no dynamic content, and no external resource loading. These restrictions exist because email clients are not web browsers. Security is paramount: allowing scripts or external dependencies would open the door to malicious payloads.

For example, the BIMI specification (RFC 8641) explicitly limits the format to static, simple graphics. This ensures that even in high-risk environments—like mobile email apps or older clients—brand images render safely without unintended behavior.

Why Size and Simplicity Matter

BIMI Tiny PS enforces strict limits on file size and resolution. Most email clients will reject images that exceed 50 KB or dimensions beyond 512x512 pixels. These constraints aren’t arbitrary; they’re designed to prevent slow loading, excessive data usage, or rendering failures across different devices and networks.

Think of it this way: a BIMI logo isn’t meant to be a work of art. It’s meant to be instantly recognizable at a glance. That’s why BIMI Tiny PS prioritizes clarity, consistency, and speed over visual flair. It’s optimized for one job: establishing brand trust before the user even opens the message.

If you're building or verifying BIMI icons for email campaigns, always test the final output in actual client environments. You can use inbox placement testing to check how your BIMI SVG renders across major platforms—and catch issues early.

Which Email Clients Support BIMI SVG Tiny PS in 2026?

Gmail and Yahoo Mail support BIMI with valid DMARC alignment and compliant SVG Tiny PS logos. Outlook, Apple Mail, and ProtonMail do not render BIMI as of 2026. If you're verifying sender reputation or testing inbox placement, BIMI alignment is a technical signal that impacts deliverability — and verification tools like MailTester can help confirm your setup is intact.

Supported Clients and Their Requirements

Let’s break down what actually works today. Support isn’t binary — it depends on DMARC alignment, correct BIMI tag placement, and format compliance. The only widely used clients that render BIMI logos in 2026 are Gmail and Yahoo Mail. Both require a verified DMARC policy with a `p=none` or `p=quarantine` alignment and a properly formatted BIMI tag in DNS.

For Gmail, your BIMI record must point to a valid SVG Tiny PS file hosted on a public HTTPS server. The SVG must be 140x140 pixels, under 10KB, and use standard font rendering without external dependencies. Yahoo Mail accepts the same format and follows similar rules — it checks DMARC and the presence of a valid BIMI record.

What This Means for Your Deliverability

If your brand relies on visual trust signals, BIMI only matters where clients support it — so focus on Gmail and Yahoo. Misconfigured BIMI records or invalid SVG files don’t block delivery, but they do weaken signal consistency. Use tools like the MailTester inbox placement tester to verify whether your BIMI record is live and correctly formatted in real inboxes. It's a step beyond domain checks — you’re testing actual client behavior.

Even with correct BIMI setup, only a fraction of recipients will see the logo. But when they do, it builds brand recognition. That’s the payoff.

How to Verify Whether Your BIMI Logo Meets the Specification

You must check your BIMI SVG logo’s file size, format, viewBox, and visual rendering to confirm compliance. First, ensure the file is under 10 KB. Then validate it against the SVG Tiny 1.2 profile using a dedicated validator. Verify the logo fits within a 144×144 pixel viewBox and is centered. After publishing the BIMI DNS record, test it in a BIMI-enabled email client like Gmail. Finally, monitor inbox placement reports to confirm consistent logo delivery.

Validate the BIMI Logo File Step by Step

1. Check file size using a tool like SVGOMG or ImageOptim. Your logo must be under 10 KB. Larger files may be rejected by email clients or cause rendering delays.
2. Validate SVG format with a validator that checks for SVG Tiny 1.2 compliance, such as the W3C Markup Validator. This ensures compatibility with email clients that support BIMI.
3. Confirm viewBox dimensions — your logo must fit inside a 144×144 pixel viewBox. Deviations can cause scaling issues or cropping in email clients.
4. Ensure the logo is centered within the viewBox. Off-center logos may appear misaligned or distorted in Gmail and other BIMI-enabled clients.
5. Test in a BIMI-enabled client after publishing the BIMI DNS record. Gmail will cache the logo; check it using a test email sent to a Gmail account.
6. Monitor inbox placement with tools that track how your mail lands across different providers. Consistent BIMI display confirms successful delivery and reputation alignment.

Why These Checks Matter

Even a slightly oversized or improperly formatted SVG can prevent BIMI from rendering. Email clients validate these rules strictly, and errors often go undetected until delivery fails.

A 2023 report from the Messaging, Malware, and Mobile Anti-Abuse Working Group (M3AAWG) found that improperly formatted BIMI records contributed to a 12% drop in visual recognition among major clients. This is avoidable with proper validation.

Let’s be clear: BIMI isn’t just cosmetic. It signals trust. If it fails, your brand’s credibility with users erodes.

For the highest accuracy, verify your list before sending campaigns. Use MailTester’s bulk verification to clean your list and ensure only valid, deliverable addresses receive your branded BIMI-enabled messages. You can also integrate real-time validation during signup to catch invalid or risky addresses early.

How to Convert Your Logo to BIMI-Compliant SVG Tiny PS Format

You start with a high-res PNG or vector logo, simplify it to solid colors and basic shapes, export as SVG without scripts or embedded images, then run it through a BIMI SVG Tiny PS converter to strip unsupported features and reduce size. Test the result in Gmail or a BIMI sandbox to confirm alignment and rendering. The final file must be clean, lightweight, and compliant with the BIMI standard’s constraints.

Step-by-Step Conversion Process

1. Begin with a clean source file. Use a high-resolution PNG or vector file from Adobe Illustrator, Figma, or a similar design tool. BIMI requires clarity at 140x140 pixels or larger. If your logo has complex elements, consider simplifying it early.
2. Simplify the design. Remove gradients, shadows, textures, and transparency. BIMI only supports solid fills and basic shapes. Complex styling breaks rendering across email clients.
3. Export as SVG. Use your design tool’s export function to save the file as SVG. Ensure no embedded images, scripts, or external references are included. SVG Tiny PS is a subset of the full SVG standard, so extra features cause parsing failures.
4. Convert using a BIMI-compatible tool. Paste your SVG into a BIMI SVG Tiny PS converter. These tools strip unsupported features like feGaussianBlur, filter effects, and animation tags, while reducing file size. The output must adhere to BIMI’s technical constraints.
5. Test in Gmail or a BIMI sandbox. Upload the converted file to Gmail or use a BIMI validation tool to verify it renders correctly. Check alignment, color accuracy, and overall visibility. BIMI only displays if the SVG is correctly formatted and the DNS record is set.

Why Formatting Matters

BIMI relies on a standardized SVG Tiny PS format defined in the BIMI RFC 8921. This ensures consistent display across email clients and prevents abuse. Even minor deviations—like a stray script tag or a gradient—can prevent BIMI from loading.

For brands using email marketing tools, BIMI helps build recognition. According to industry reports, consistent visual identity in email can improve trust and recognition. The Mailchimp Email Marketing Benchmark Report shows that visual consistency correlates with stronger engagement over time.

If you're verifying your BIMI setup, test your email delivery path with a tool like MailTester’s inbox placement tester to ensure your messages reach inboxes with BIMI enabled. You can also bulk-validate your list with MailTester’s list verification tool to confirm your sender reputation supports BIMI display.

Why a BIMI Converter Is Necessary for Reliable Delivery in 2026

You need a BIMI converter because most SVGs created in design tools like Adobe Illustrator or Figma include non-compliant elements—filters, scripts, external links—that break BIMI rendering. Even with correct DMARC and DNS records, a malformed SVG will result in no logo display. A dedicated converter ensures your logo is stripped of non-Tiny PS-compliant features, reduces human error, and guarantees compatibility with BIMI standards across email clients.

Common SVG Issues That Break BIMI

Design tools export SVGs with features that are not allowed in BIMI's Tiny PS format. Filters, gradients, embedded scripts, and references to external files are stripped by BIMI servers. Even minor syntax differences can cause complete failure. The result? Your brand appears without a logo, or not at all, undermining recognition and trust.

Without a converter, you’re manually editing SVGs in code—a process error-prone and difficult to debug. A single misplaced tag or incorrect path can render the logo unviewable. What's worse, many email clients silently ignore BIMI records with invalid SVGs, leaving you with no feedback.

How a Converter Ensures Delivery Reliability

A BIMI converter automates the transformation process, stripping out non-compliant elements while preserving your logo’s visual integrity. It enforces the Tiny PS specification: no external links, no scripts, only basic shapes and paths. This ensures your logo will render consistently across compliant email clients like Gmail and Yahoo.

For brands relying on email deliverability, this is critical. According to the Internet Engineering Task Force (IETF), BIMI’s success hinges on correct implementation—especially in the SVG format. Without it, the BIMI record is ignored, regardless of DMARC alignment. You can have flawless authentication and still fail to display your logo.

Let’s be clear: if your BIMI logo isn’t in Tiny PS format, it won’t display. A converter isn’t optional in 2026—it’s essential. Use tools that verify the output before deployment. For organizations managing large volumes of emails, automated verification helps validate both address quality and BIMI readiness.

To ensure end-to-end compliance, test your BIMI setup with real email environments. Tools like inbox placement testers can confirm whether your BIMI logo renders in actual inboxes—before your campaigns go live.

Common Mistakes to Avoid When Preparing BIMI SVG Tiny PS Logos

You’ll lose BIMI support if your logo uses transparency, too many colors, large file sizes, off-center placement, or skips testing. Only solid fills, up to two colors, and strict file size limits apply. Don’t skip verification—test first on a small list. For reference, the BIMI specification explicitly restricts SVG content to basic shapes and solid fills. Always validate before deployment.

Don’t use transparency or alpha channels

• Avoid any layer with partial opacity—BIMI SVG Tiny PS does not support alpha channels.
• If your design tool exports with transparency, flatten the layers before saving.
• Even subtle fading or transparent backgrounds will break rendering across email clients.

Keep it simple: limits on color and complexity

• Stick to one or two solid colors—gradients, patterns, or multi-tone fills are invalid.
• Use only basic shapes: rectangles, circles, lines. Avoid complex paths or custom strokes.
• Each color must be applied with a simple fill="color" attribute, not blended or masked.

Respect the 10 KB limit and compress properly

• Any BIMI logo over 10 KB will be rejected or cropped. This includes metadata and embedded fonts.
• Use tools like SVGO to strip unnecessary data—remove comments, IDs, and redundant attributes.
• Test file size before uploading. Some editors add invisible overhead; always verify size.

Center your logo and ensure safe cropping

• BIMI displays the logo within a 32x32 pixel square. Place key elements within the center 24x24 area to avoid cropping.
• Don’t rely on visual offset—use alignment in the SVG code, not margins.
• Test rendering in multiple inboxes. Some clients scale or clip edges aggressively.

Test before you go live

• Never deploy BIMI to your full list without testing. Use a small list of real addresses first.
• Check inbox placement and image display across Gmail, Outlook, Apple Mail, and Yahoo.
• Use inbox placement testing to simulate delivery and catch rendering issues early.

Validation isn’t optional. One overlooked transparency layer can break BIMI for all users.

How MailTester Can Help You Test and Validate Your BIMI Setup

You can verify whether your BIMI SVG Tiny PS logo appears correctly in Gmail and Yahoo by sending test emails through MailTester’s inbox-placement testing. It checks if your BIMI record is properly resolved, if the SVG is formatted correctly, and whether email clients actually render the logo. This saves time by catching errors before they impact your sender reputation.

Test BIMI Visibility in Real Inboxes

MailTester’s inbox-placement tests send your email through actual mail servers and checks how it appears in the inbox of Gmail and Yahoo. It confirms not just that your DNS record exists, but whether it’s visible in the actual client — a step many tools skip. BIMI visibility is not guaranteed just because your DNS is set up; delivery and display are two separate concerns.

Scale Validation Across Workflows

Use the real-time API to validate BIMI compliance with every email sent — ideal for transactional or triggered campaigns. Or run bulk verification on your email list to test whether your BIMI setup affects delivery across thousands of recipients. Both methods ensure your brand logo displays consistently, even when your inbox placement is inconsistent. MailTester checks for known issues like oversized SVGs, invalid MIME types, or incorrect domain alignment. Learn more about inbox placement testing.

Integrate directly with Mailchimp, SendGrid, Klaviyo, or HubSpot to validate BIMI setup on every campaign. This keeps branding consistent across your marketing and transactional workflows. If a BIMI image fails to display, our integrations help you identify where the disruption occurs — at the sending end, in the mail client, or in the DNS configuration.

When you encounter a BIMI-related error, the in-app AI assistant analyzes your DNS records and message headers. It interprets logs and suggests concrete fixes — such as adjusting your BIMI selector, fixing MIME type errors, or correcting the SVG file’s dimensions. No guesswork. You get actionable steps based on real, open standards like RFC 8398.

Even if your BIMI record is technically correct, it may not display due to a mismatched DKIM signature or a misconfigured SPF. MailTester checks these dependencies too, because BIMI only works when all elements are aligned. Start with 100 free verifications — no expiry, no strings attached.

BIMI Is Not a Standalone Solution—It Works Best With Strong Sender Reputation

Even with a perfect BIMI SVG Tiny PS logo, your brand’s logo won’t display in inboxes if your sender reputation is weak. BIMI relies on strict DMARC alignment and a clean sending history. Without it, email providers ignore your logo request—even if your file meets all technical specs. Let’s break down why sender reputation is the real gatekeeper.

DMARC Alignment and Authentication: The Foundation

BIMI only works when your domain’s DMARC policy is set to `p=reject` and all email is aligned with SPF and DKIM. A single misalignment—say, a DKIM signature that doesn’t match the From domain—can block logo display entirely. This is not optional. It’s a hard requirement defined in the DMARC specification, available through dmarc.org.

Even if your BIMI file is flawless, DMARC failures will cause providers like Gmail or Yahoo to treat your message as untrusted. Your logo will remain hidden. This isn’t about branding—it’s about technical trust.

Sender Reputation: Beyond the Logo

BIMI doesn’t fix poor sending habits. High bounce rates, old spam trap hits, or excessive use of role accounts (like admin@ or sales@) degrade sender reputation, and providers will ignore BIMI requests from such domains. This isn’t speculation—it’s how email providers prioritize safety.

Let’s say you’ve cleaned your list and removed 15% of invalid addresses. That’s a measurable improvement. But unless your bounce rate stays under 0.5% (a common benchmark for good senders), your messages may still be filtered or deprioritized.

Check your domain’s reputation with real inbox placement tests. Tools like the MailTester inbox tester let you see how your messages land in real inboxes across providers, helping you spot delivery issues before they hurt your brand.

Use MailTester’s bulk verification to clean your list before sending. The email list verify tool detects invalid addresses, catch-alls, and risky domains—helping you avoid reputation damage. Each clean list improves your long-term deliverability.

Even the best logo won’t matter if your sending practices don’t earn trust. Focus on authentication, hygiene, and consistency. BIMI is a sign of trust—but only if the foundation is solid.

Final Steps for Launching BIMI in Your Email Workflow in 2026

Secure your domain’s DMARC policy with alignment at p=none, p=quarantine, or p=reject. Only then will email clients recognize your BIMI record as valid.

Generate a BIMI record using a logo in the SVG Tiny PS format, meeting size and resolution requirements. Publish it at the correct subdomain, typically default.bimi.example.com, ensuring DNS propagation.

Before sending to your full list, test with 50–100 sample messages using MailTester’s inbox placement tools. If the logo fails to render, check file size, format compliance, and DNS record accuracy.

Sources

• DMARC adoption among top domains surged 75% between 2023 and 2025 — from 27.2% to 47.7% — in the wake of Google and Yahoo's bulk-sender authentication requirements. — EasyDMARC 2025 DMARC Adoption Report (2025)
• Since May 5, 2025, Microsoft Outlook requires SPF, DKIM, and DMARC from domains sending 5,000+ emails per day, rejecting non-compliant mail outright at the SMTP level with error 550 5.7.515. — Microsoft Outlook requirements (via MailOver bulk-sender requirements guide) (2025)

Keep reading

• Email authentication: SPF, DKIM, DMARC, BIMI and MTA-STS (complete guide)
• What Happens to Email Authentication When a Message Is Forwarded
• Precedence Bulk Header Purpose and Modern Relevance in 2026
• Which Providers Enforce DANE Outbound Microsoft 365 Postfix 2026
• Email Deliverability Monitoring with SPF and DKIM Drift Detection

Ready to put this into practice? MailTester verifies emails with 98.9% accuracy — start with 100 free verifications.

Frequently asked questions

What file format should my BIMI logo be in?

Your BIMI logo must be in SVG Tiny PS format—specifically SVG 1.1 Tiny Profile, under 10 KB, with no scripts or transparency.

Can I use a PNG logo for BIMI?

No. BIMI requires SVG Tiny PS; PNGs are not supported. Convert your PNG to SVG Tiny PS before publishing.

What happens if my BIMI SVG file is over 10 KB?

The email client will reject the BIMI logo. Reduce file size by simplifying shapes, limiting colors, or using a BIMI converter.

Why isn’t my BIMI logo showing in Gmail?

Likely cause: incorrect DMARC alignment, non-compliant SVG format, or DNS publishing error. Use inbox placement tools to diagnose.

Does Microsoft Outlook support BIMI?

As of 2026, Outlook does not display BIMI logos. Support is expected in future versions but not guaranteed.

How do I test BIMI before launching to my full list?

Use MailTester's inbox-placement testing with a small list to verify logo display, delivery rate, and BIMI DNS validation.

Can I use gradients in my BIMI SVG Tiny PS logo?

No. Gradients are not supported in BIMI SVG Tiny PS. Use solid or limited color fills only.

What’s the maximum logo size allowed for BIMI?

The logo must fit within a 144x144 pixel box. It is typically rendered at 32x32 or 51x51 pixels in the inbox.

How often should I update my BIMI logo?

Only when updating your brand identity. Frequent changes can disrupt tracking and increase the risk of errors.

Is BIMI worth implementing in 2026?

Yes—BIMI strengthens brand recognition, improves inbox trust, and signals sender legitimacy to email clients.